pH 計為什么要定期校準？-深圳市慧聰源環(huán)?？萍加邢薰?/title> <link rel="stylesheet" type="text/css" href="/skins/270528/css/style.css"> <script src="/skins/270528/js/jquery-3.6.0.min.js"></script> <link rel="shortcut icon" href="/skins/270528/favicon.ico">  <script type="text/javascript"> document.addEventListener("touchstart", function () { }, true); </script>  <script language="javascript" type="text/javascript"> var nav= '5'; </script>  <script type="application/ld+json"> { "@context": "https://ziyuan.baidu.com/contexts/cambrian.jsonld", "@id": "http://m.lemahu.com/szhcy-Article-3294667/", "title": "pH 計為什么要定期校準？", "pubDate": "2023-03-14T09:18:06", "upDate": "2023-03-14T09:18:06" }</script> <script language="javaScript" src="/js/JSChat.js"></script><script language="javaScript">function ChatBoxClickGXH() { DoChatBoxClickGXH('https://chat.chem17.com',262687) }</script><script> (function(){ var bp = document.createElement('script'); var curProtocol = window.location.protocol.split(':')[0]; if 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255);"> <strong>合泰pH計</strong>的精度和壽命取決于ph電極,價格差異也很大,但很多時候是使用方法不當,致使測量不準。</span><br data-filtered="filtered" style="color: rgb(61, 70, 77); font-family: "Helvetica Neue", Helvetica, "PingFang SC", Tahoma, Arial, sans-serif; font-size: small; white-space: normal; background-color: rgb(255, 255, 255);"/><span style="color: rgb(61, 70, 77); font-family: "Helvetica Neue", Helvetica, "PingFang SC", Tahoma, Arial, sans-serif; font-size: small; background-color: rgb(255, 255, 255);"> 一般筆式pH 計出廠前均已調校,可直接使用。pH計使用過一段時間后都要重新調校,時間取決于所測溶液和使用頻率。使用一段時間后,<strong>pH 計</strong>電極不對稱,電位將會發(fā)生很大改變,故須定期校準。</span><br data-filtered="filtered" style="color: rgb(61, 70, 77); font-family: "Helvetica Neue", Helvetica, "PingFang SC", Tahoma, Arial, sans-serif; font-size: small; white-space: normal; background-color: rgb(255, 255, 255);"/><span style="color: rgb(61, 70, 77); font-family: "Helvetica Neue", Helvetica, "PingFang SC", Tahoma, Arial, sans-serif; font-size: small; background-color: rgb(255, 255, 255);"> <strong>ph電極</strong>標定校準的次數(shù)取決于試樣、ph電極性能及對測量的度要求。高精度測量（ ≤±0103pH）,應及時校準;一般精度測量（ ≤±011pH） ,經(jīng)過一次校準后可連續(xù)使用兩周甚至更長時間。只要測量顯示pH 值是準確的,就沒必要頻繁對ph電極進行標定。</span><br data-filtered="filtered" style="color: rgb(61, 70, 77); font-family: "Helvetica Neue", Helvetica, "PingFang SC", Tahoma, Arial, sans-serif; font-size: small; white-space: normal; background-color: rgb(255, 255, 255);"/><span style="color: rgb(61, 70, 77); font-family: "Helvetica Neue", Helvetica, "PingFang SC", Tahoma, Arial, sans-serif; font-size: small; background-color: rgb(255, 255, 255);"> 先測試與被測溶液較接近的標準溶液,根據(jù)誤差大小,確定是否需要重新校準。在下列情況下重新校準:</span><br data-filtered="filtered" style="color: rgb(61, 70, 77); font-family: "Helvetica Neue", Helvetica, "PingFang SC", Tahoma, Arial, sans-serif; font-size: small; white-space: normal; background-color: rgb(255, 255, 255);"/><span style="color: rgb(61, 70, 77); font-family: "Helvetica Neue", Helvetica, "PingFang SC", Tahoma, Arial, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">①更換新的<strong>ph電極</strong>。</span><br data-filtered="filtered" style="color: rgb(61, 70, 77); font-family: "Helvetica Neue", Helvetica, "PingFang SC", Tahoma, Arial, sans-serif; font-size: small; white-space: normal; background-color: rgb(255, 255, 255);"/><span style="color: rgb(61, 70, 77); font-family: "Helvetica Neue", Helvetica, "PingFang SC", Tahoma, Arial, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">②測量濃酸液（pH < 2）以后,或測量濃堿液（pH > 12）以后。</span><br data-filtered="filtered" style="color: rgb(61, 70, 77); font-family: "Helvetica Neue", Helvetica, "PingFang SC", Tahoma, Arial, sans-serif; font-size: small; white-space: normal; background-color: rgb(255, 255, 255);"/><span style="color: rgb(61, 70, 77); font-family: "Helvetica Neue", Helvetica, "PingFang SC", Tahoma, Arial, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">③測量含有氟化物的溶液或較濃的有機溶液后。</span><br data-filtered="filtered" style="color: rgb(61, 70, 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