portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px;">
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">緩沖溶液是一種能使portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值保持穩(wěn)定的溶液。如果向這種溶液中加入少量的酸或堿，或者在溶液中的化學(xué)反應(yīng)產(chǎn)生少量的酸或堿，以及將溶液適當(dāng)稀釋，這個(gè)溶液的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值基本上穩(wěn)定不變，這種能對(duì)抗少量酸堿或大或稀釋，而使portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值不變化的溶液就稱為緩沖溶液。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">標(biāo)準(zhǔn)緩沖液有以下特點(diǎn)：
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">1portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）標(biāo)準(zhǔn)溶液的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值是已知的，并達(dá)到規(guī)定的準(zhǔn)確度；
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）標(biāo)準(zhǔn)溶液的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值有良好的復(fù)現(xiàn)性和穩(wěn)定性，具有較大的緩沖容量，較小的稀釋值和較小的溫度系數(shù)；
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">3portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）溶液的制備方法簡(jiǎn)單；
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62); font-weight: normal;">
portant; word-wrap: break-word !important; color: rgb(123, 12, 0); font-size: 24px;">2.portant; word-wrap: break-word !important; color: rgb(123, 12, 0); font-size: 16px;">portant; word-wrap: break-word !important;">如何配制pH標(biāo)準(zhǔn)緩沖溶液？
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">對(duì)于portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">一般portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">測(cè)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">量，可使用成套portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">組沖試劑（可配制portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">250mLportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">），portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">配制溶液時(shí)，應(yīng)使用去離子水，并預(yù)先煮沸portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">15portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">～portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">30portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">分portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">鐘，以除去溶解的二氧化碳。剪開塑料袋將試劑倒入燒杯中，用適量去離子水使之溶解，并沖洗包裝袋，再倒入portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">250mLportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">容量瓶中，稀釋至刻度，充分搖勻即可。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; font-size: 24px;">portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">3. portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">如何正確保存和使用pH緩沖溶液？
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">緩沖溶液配制后，應(yīng)裝在玻璃瓶或聚乙烯瓶中（堿性portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">緩沖液，如，portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=9.18portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">、portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=10.01portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">、portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=12.46portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">等，應(yīng)裝在聚乙烯瓶中）瓶蓋嚴(yán)密蓋緊，在冰箱portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">中低溫(portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">5portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">～portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">10portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">℃portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">保存，一般portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">可使用六個(gè)月左右，如發(fā)現(xiàn)有混頻器濁，發(fā)霉或沉淀現(xiàn)象，不能繼續(xù)使用。使用時(shí)，應(yīng)準(zhǔn)備幾個(gè)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">50mLportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">聚乙烯小瓶，將大瓶中的組沖溶液倒入小瓶中，并在環(huán)境溫度下放置portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">1portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">～portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">個(gè)小時(shí)，等溫度平衡后再使用。使用后不得再倒入大瓶中，以免污染，瓶中的緩沖溶液在＞portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">10portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">℃portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">的環(huán)境條件下可以使用portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">～portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">3portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">天，一般portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=7.00portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">、portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=6.86portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">、portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=14.00portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">三種溶液使用時(shí)間可以長一些，portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);"> pH=9.18portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">和portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=10.01portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">溶液由于吸收空氣中的二氧化碳，其portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值比較容易變化。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; color: rgb(123, 12, 0); font-size: 24px;">4portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">.pH緩沖溶液有何用途？
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">1portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">測(cè)量前標(biāo)定校準(zhǔn)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）用以檢定portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)的準(zhǔn)確性，例如，用portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=6.86portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">和portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=14.00portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">，標(biāo)定portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)后，將portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">電極插入portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=9.18portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">溶液中，檢查儀器顯示值和標(biāo)準(zhǔn)溶液的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值是否一致。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">3portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）在一般精度測(cè)量時(shí)檢portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)是否需要重新標(biāo)定。portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)標(biāo)定并使用后也許會(huì)產(chǎn)生漂移或變化，因此在測(cè)試前將電極插入與被測(cè)溶液比較接近的標(biāo)準(zhǔn)緩沖液中，根據(jù)誤差大小確定是否需要重新標(biāo)定。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">4portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）檢測(cè)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">電極的性能。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; color: rgb(123, 12, 0); font-size: 24px;">5portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">portant; word-wrap: break-word !important; font-size: 16px;">.pH電極為何要浸泡？如何正確浸泡pH復(fù)合電極？
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">電極使用前必須浸泡，因?yàn)椋?/em>portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">球泡是一種特殊的玻璃膜，在玻璃膜表有一很薄的凝膠層，它只有在充分濕潤的條件下才能與溶液中的氫離子有良好的影響。同時(shí)，玻璃電極經(jīng)過浸泡，可以使不對(duì)稱電勢(shì)大大下降并趨向穩(wěn)定。portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">玻璃電極一般可以用蒸餾水或portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=4portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">的緩沖溶液浸泡。通常用portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=4portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">緩沖溶液浸泡更好上些，浸泡時(shí)間至portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">24portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">小時(shí)或更長，根據(jù)球泡玻璃膜厚度、電極老化程度而不同。同時(shí)，參比電極的液接界也需要浸泡。因?yàn)椋绻航咏绺珊詴?huì)使液接界電勢(shì)增大或不穩(wěn)定，參比電極的浸泡液必須和參比電極的外參比溶液一致，即，portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">3.3mol/L KClportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">溶液或飽和portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">KClportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">溶液，浸泡時(shí)間一般幾小時(shí)即可。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">因此，對(duì)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極而言，就必須浸泡在含portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">KClportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=4portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">緩沖液中，這樣才能對(duì)玻璃球泡和液接界同時(shí)起作用。這里要特別提醒注意，因?yàn)檫^去人們使用單支的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">PHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">玻璃電極已習(xí)慣于用去離子水或portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=4portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">組沖液浸泡，后來使用portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極時(shí)依然采用這樣的浸泡方法，甚至在一些不正確的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極的使用說明書中也會(huì)進(jìn)行這種錯(cuò)誤的指導(dǎo)。這種錯(cuò)誤的浸泡方法引起的直接后果就是使一支性能良好的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極就成一支響應(yīng)慢、精度差的電極，而且浸泡時(shí)間越長性能越差，因?yàn)榻?jīng)過長時(shí)間的浸泡，液接界內(nèi)部（例如，砂芯內(nèi)部）的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">KClportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">濃度已大大降低了，使液接界電勢(shì)增大和不穩(wěn)定。當(dāng)然，只要在正確的浸泡溶液中重新浸泡數(shù)小時(shí)，電極還是會(huì)復(fù)原的。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">另外，portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">電極也不能浸泡在中性或堿性緩沖溶液中，長期浸泡在此類溶液中會(huì)使portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">PHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">玻璃膜響應(yīng)遲鈍。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">正確的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">電極浸泡液的配制：portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">取portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=4.00portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">緩沖劑（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">250mLportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）一包，溶于portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">250mLportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">純水中，再加入portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">56portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">克分析純portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">KClportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">，適當(dāng)加熱，攪拌至完全溶解即成。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; color: rgb(123, 12, 0); font-size: 24px;">6portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">portant; word-wrap: break-word !important; font-size: 16px;">. 可充式和非可充式pH復(fù)合電極有何區(qū)別？
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極外殼有塑料和玻璃的區(qū)分?？沙涫?/em>portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極即在電極外殼上有一加液孔，當(dāng)電極的外參比溶液流失后，可將加液孔打開，重新補(bǔ)充portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">KClportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">溶液。而非可充式portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極內(nèi)裝凝膠狀portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">KClportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">，不易流失也無加液孔。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">可充式portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極的特點(diǎn)是參比溶液有較高的滲透速度率，液接界電位穩(wěn)定重現(xiàn)，測(cè)量精度較高。而且當(dāng)參比電極減少或受污染后可以補(bǔ)充或更換portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">KClportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">溶液，但缺點(diǎn)是使用較麻煩?？沙涫?/em>portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極使用時(shí)應(yīng)將加液孔打開，以增加液體壓力，加速portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">電極響應(yīng)，當(dāng)電介液液面低于加液孔portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">厘米時(shí)，應(yīng)及時(shí)補(bǔ)充新的電介液。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">非可充portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極的特點(diǎn)是維護(hù)簡(jiǎn)單使用方便，因此，也得到廣泛的應(yīng)用。但作為實(shí)驗(yàn)室portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">電極極使用時(shí)，在長期和邊續(xù)的使用條件下，液接界處的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">KClportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">濃度會(huì)減少，影響測(cè)試精度。因此非可充式portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極不用時(shí)，應(yīng)浸在電極浸泡液中，這樣下次測(cè)試時(shí)電極性能會(huì)很好，portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">而部分實(shí)驗(yàn)室portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">電極都不是長期和邊續(xù)的測(cè)試，因此，這種結(jié)構(gòu)對(duì)精度的影響是比較小的。而工業(yè)的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極由于對(duì)測(cè)試精度的要求比較低，所以使用方便就成為主要的選擇。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; color: rgb(123, 12, 0); font-size: 24px;">7portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">portant; word-wrap: break-word !important; font-size: 16px;">. 如何正確使用pH復(fù)合電極？
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">1portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">球泡前端不應(yīng)有氣泡，如有氣泡應(yīng)用力甩去。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">電極從浸泡瓶中取出后，應(yīng)在去離子水中晃動(dòng)并甩干，不要用紙巾擦拭球泡，否則由于靜電感應(yīng)電荷轉(zhuǎn)移到玻膜上，會(huì)延長電勢(shì)穩(wěn)定的時(shí)間，更好的方法是使用被測(cè)溶液沖洗電極。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">3portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);"> pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極插入被測(cè)溶液后，要攪拌晃動(dòng)幾下再靜止放置，這樣會(huì)加快電極的響應(yīng)。尤其使用塑殼portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極時(shí)，攪拌晃動(dòng)要厲害一些，因?yàn)椋蚺莺退軞ぶg會(huì)有一個(gè)小小的空腔，電極浸入溶液后有時(shí)空腔中的氣體來不及排除會(huì)產(chǎn)生氣泡，使球泡或液接界與溶液接角不良，因此必須用力攪拌晃動(dòng)以排除氣泡。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">4portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">在粘稠性試樣中測(cè)試之后，電極必須用去離子水反復(fù)沖洗多次，以除去粘附在玻璃膜上的試樣。有時(shí)還需先用其它試劑洗去試樣，再用水洗去溶劑，浸入浸泡液中活化。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">5portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">避免接觸強(qiáng)酸強(qiáng)堿或腐蝕性溶液，如果測(cè)試此類溶液，應(yīng)盡量減少浸入時(shí)間，用后仔細(xì)清洗干凈。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">6portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">避免在無水乙醇、濃硫酸等脫水性介質(zhì)中使用，它們會(huì)損壞球泡表面的水合凝膠層。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">7portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">塑殼portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極的外殼材料是聚碳酸酯塑料（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">PCportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">PCportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">塑料在有些溶劑中會(huì)溶解，如四氯化碳、三氯乙烯、四氫呋喃等，如果測(cè)試中含有以上溶劑，就會(huì)電極外殼，此時(shí)應(yīng)改用玻璃外殼的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電極。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; color: rgb(123, 12, 0); font-size: 24px;">8portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">portant; word-wrap: break-word !important; font-size: 16px;">.pH電極如何清洗？
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">球泡和液接界污染后先用以下溶劑清洗，再用去離子水洗去溶劑，將電極浸入浸泡液中活化。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">污染物portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">清洗劑portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">無機(jī)金屬氧化物portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">低于portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">1mol/Lportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">稀酸
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">有機(jī)油脂類物質(zhì)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">稀洗滌劑（弱酸性）
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">樹脂高分子物質(zhì)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">稀酒精、丙酮、乙醚
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">蛋白質(zhì)血球沉淀物portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">酸性酶溶液（食母生片）
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">顏料類物質(zhì)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">稀漂白液、過氧化氫
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; color: rgb(123, 12, 0); font-size: 24px;">9portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">.如何修復(fù)pH電極？
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">復(fù)合電portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">極的“損壞”，其現(xiàn)象是敏感梯度降低portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">、響應(yīng)慢、讀數(shù)重復(fù)性差，可能由以下三種因素引起，一般客戶可以采用適當(dāng)?shù)姆椒ㄓ枰孕迯?fù)：
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">1portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）電極球泡和液接界受污染，可以用細(xì)的毛刷、棉花或牙簽等，仔細(xì)去除污物。有些塑殼電極頭部的保護(hù)罩可以旋下，清洗就方便了，如污染嚴(yán)重，可按第portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">8portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">條的方法用清潔劑清洗。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）外參比溶液受污染，有些電極的結(jié)構(gòu)是可添加溶液的，此時(shí)，可用針筒將電極的外參比溶液抽凈，配制新的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">3.3mol/Lportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">或飽和portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">KClportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">溶液，再加進(jìn)去，注意第一、二次加進(jìn)去時(shí)再要抽出來，以便將電極內(nèi)腔清洗凈。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">3portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）玻璃敏感膜老化：portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">將電極球portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">泡用portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.1mol/Lportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">稀鹽酸（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">9mLportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">鹽酸用純水稀釋至portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">100mLportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">浸portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">泡portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">24portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">小時(shí)用純水洗凈，再用電極浸泡溶液浸泡portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">24portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">小portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">時(shí)。如果鈍化比較嚴(yán)重，也可以將電極下portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">端浸泡在portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">45portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">的氫氟酸溶液中portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">3portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">～portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">5portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">秒鐘portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">溶液配制：portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">4mLportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">氫氟酸用純水稀釋至portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">100mLportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">，用純水洗凈，然后，在電極浸泡溶液中浸泡portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">24portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">小時(shí)，使其恢復(fù)性能。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif;">
portant; word-wrap: break-word !important; color: rgb(123, 12, 0); font-size: 24px;">10portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">. 什么是pH計(jì)的一點(diǎn)校準(zhǔn)？
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">任何一種portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)都必須經(jīng)過portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">標(biāo)準(zhǔn)溶液的校準(zhǔn)后才可測(cè)量樣品的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值，對(duì)于測(cè)量精度在portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.1portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">，portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">以下的樣品，可以采一點(diǎn)校準(zhǔn)方法調(diào)整儀器，一般選用portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=6.86portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">或portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=7.00portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">標(biāo)準(zhǔn)緩沖溶液。有些儀器本身只portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.2pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">或portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.1pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">，因此儀器只設(shè)有一個(gè)定位調(diào)節(jié)旋扭，具體操作步聚如下：
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">1portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）測(cè)量標(biāo)準(zhǔn)緩沖液溫度，查表確定該溫度下的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值，將溫度補(bǔ)嘗旋鈕調(diào)節(jié)至該溫度下；
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）用純水沖洗電極并甩干；
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">3portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）將電極浸入緩沖溶液晃動(dòng)后靜止放置，待讀數(shù)穩(wěn)定后，調(diào)節(jié)定位旋鈕使儀器顯示該標(biāo)準(zhǔn)溶液的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值；
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">4portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）取出電極沖洗并甩干；
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">5portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）測(cè)量樣呂溫度，并將portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)溫度補(bǔ)償旋鈕調(diào)節(jié)至該溫度值；
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">6portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）將電極浸入樣品溶液，晃動(dòng)后靜止放置，顯示穩(wěn)定后讀數(shù)。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; color: rgb(123, 12, 0); font-size: 24px;">11portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">. 什么是pH計(jì)的二點(diǎn)校準(zhǔn)?
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">對(duì)于精密級(jí)的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)，除了設(shè)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">有“定位”和“溫度補(bǔ)償”調(diào)節(jié)外，還設(shè)電極“斜率”調(diào)節(jié)，它就需要用二種標(biāo)準(zhǔn)緩沖液進(jìn)行校準(zhǔn)。portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">一般先以portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=6.86portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">或portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=7.00portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">進(jìn)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">行“定位”校準(zhǔn)，然后根據(jù)測(cè)試溶液的酸堿情況，portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">選用portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=4.00portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（酸性）或portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=9.18portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">或portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH=10.01(portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">堿性portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">緩沖溶液進(jìn)行portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">“portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">斜率校正，具體操作步聚為：
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">1portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）電極極洗凈并甩干，浸入portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=6.86portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">或portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=7.00portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">標(biāo)準(zhǔn)溶液中，溫度補(bǔ)償旋鈕置于溶液溫度處。待示值穩(wěn)定后，調(diào)節(jié)定位旋鈕使儀器示值為標(biāo)準(zhǔn)溶液的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）取出電極洗凈并甩干，浸入第二種標(biāo)準(zhǔn)溶液。待示值穩(wěn)定后，調(diào)節(jié)儀器斜率旋鈕，使儀器的示值為第二種標(biāo)準(zhǔn)溶液的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">3portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）電極極洗凈并甩干，再浸入portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH6.86portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">或portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH7.00portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">標(biāo)準(zhǔn)溶液中，如果誤差超過portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.02pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">，則重復(fù)第（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">1portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">），（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）步聚。直至在二種標(biāo)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">準(zhǔn)溶液中不需要調(diào)節(jié)旋鈕都能顯示正確的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">PHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">4portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">取出電極洗凈并甩干，將portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">溫度補(bǔ)償旋鈕調(diào)節(jié)至樣品溫度，將電極浸入樣品溶液，晃動(dòng)后靜止放置，顯示穩(wěn)定后讀數(shù)。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; color: rgb(123, 12, 0); font-size: 24px;">12portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">. 溫度對(duì)pH精度測(cè)量有多大影響？
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">對(duì)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">電極，溫度影響每一個(gè)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">為portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">0.003pH/portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">℃portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">，例如，一個(gè)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">0.2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">級(jí)的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)，在portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">30portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">℃portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">緩沖液中進(jìn)行校準(zhǔn)，然后測(cè)試portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">60portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">℃portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">的溶portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">液(假定portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">溶液的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">范圍在portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH6portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">～portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">8portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">之間與portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH7.00portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">相差一個(gè)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">單portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">位)，則溫度portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">影響的最大誤差就是portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">30×0.003=0.09pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">。如果是portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">3portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">個(gè)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">單portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">位(在portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pH4portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">～portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">10portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">范圍portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">內(nèi))，最大portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">誤差就是portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">0.27pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">，從中可以看出溫度對(duì)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">的影響是很大的。當(dāng)然，我們也可以從中得出結(jié)論，為了減少溫度對(duì)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; font-family: Helvetica, sans-serif; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">測(cè)量的誤差，我們?cè)撟⒁庖韵氯c(diǎn)：
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">1portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);"> portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">盡量選擇接近被測(cè)溶液portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">值的緩沖溶液校準(zhǔn)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）盡量使校準(zhǔn)溶液的溫度與被測(cè)溶液的溫度一致或接近。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">3portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）應(yīng)該選擇有溫度補(bǔ)償?shù)?/em>portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">精度高于portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.1pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)都有溫度補(bǔ)償調(diào)節(jié)，而portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">級(jí)的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)就不帶有溫度補(bǔ)償。有些portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.2portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">級(jí)的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)也號(hào)稱有portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.1portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">級(jí)的精度，其實(shí)這是不可能的，有人是將分辨率portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.1pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">和精度portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.1pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">這二個(gè)概念進(jìn)行了混淆。即使以一個(gè)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">單位來說，相隔portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">60portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">℃portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">誤差就是portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.003×60=0.18pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">，因此，沒有溫度補(bǔ)償?shù)?/em>portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)，最高的精度也只有portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">0.2pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; font-size: 24px;">portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">13portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">.溫度補(bǔ)償能消除所有溫度引起的誤差嗎?
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">必須特別指出的是，portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)上設(shè)置的溫度補(bǔ)償，只是補(bǔ)償電極的斜率項(xiàng)（portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">2.303RT/Fportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">）。受溫度影響的還有玻璃電極的標(biāo)準(zhǔn)電勢(shì)，液接界電勢(shì)等，它們與溫度并非成嚴(yán)格的線性關(guān)系。同時(shí)，portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">電極也需要一定的時(shí)間才能達(dá)到新溫度下的平衡。因此，不管是手動(dòng)溫度補(bǔ)償還是自動(dòng)溫度補(bǔ)償，都不是很充分的。根據(jù)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">測(cè)量的操作定義，要想得到精密的測(cè)量結(jié)果，樣品溶液與標(biāo)準(zhǔn)溶液應(yīng)在相同和恒定的溫度下測(cè)量，這就是等溫測(cè)量原理。對(duì)于一般精度要求的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">測(cè)量，樣品溶液與標(biāo)準(zhǔn)溶液的溫度不同時(shí)，可使用溫度補(bǔ)償。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">
portant; word-wrap: break-word !important; color: rgb(123, 12, 0); font-size: 24px;">14portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">portant; word-wrap: break-word !important; font-size: 16px;">．如何判斷你的pH計(jì)是否準(zhǔn)確？
portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">有不少用戶在使用portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)時(shí)都心存疑惑，這個(gè)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)到底準(zhǔn)不準(zhǔn)？有人以工作經(jīng)驗(yàn)來判斷，有人以portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">試紙來判斷，也有人以過去使用的portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)來判斷，這些都是不可靠的。其實(shí)，唯一可靠和最簡(jiǎn)單的方法就是以portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">標(biāo)準(zhǔn)緩沖溶液來來進(jìn)行檢定。這是唯一的檢測(cè)標(biāo)準(zhǔn)。取三個(gè)標(biāo)準(zhǔn)緩沖溶液：portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=6.86portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">、portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=4.00portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">、portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=9.18(portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">最好是新鮮配制并且溫度相同portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">),portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">以portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=6.86Fportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">進(jìn)行定位校準(zhǔn)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">,portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">以portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=4.00portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">進(jìn)行斜率校準(zhǔn)portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">,portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">然后測(cè)試portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pH=9.18portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">，portant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">pHportant; word-wrap: break-word !important; font-size: 14px; line-height: 21px; color: rgb(62, 62, 62);">計(jì)是否準(zhǔn)確，是否合格立見分曉。
portant; word-wrap: break-word !important; color: rgb(123, 12, 0);">小結(jié)：注意事項(xiàng)
portant; word-wrap: break-word !important;">
portant; word-wrap: break-word !important; font-size: 14px;">儀器在使用前必須進(jìn)行校準(zhǔn)，即，以上4～8款操作。如果儀器不關(guān)機(jī)，可以連續(xù)測(cè)定，一旦關(guān)機(jī)就要校準(zhǔn)。但12小時(shí)即使不關(guān)機(jī)也必須校準(zhǔn)一次。
portant; word-wrap: break-word !important; font-size: 14px; line-height: 22.4px; color: rgb(136, 136, 136);">文章來源網(wǎng)絡(luò)。
