亚洲国产精品无码专区_實(shí)驗室酸度計及電導率儀的電極使用與維護保養-江蘇盛奧華環(huán)?？萍加邢薰?/title> <link rel="stylesheet" type="text/css" href="/skins/257424/css/swiper.min.css"> <link rel="stylesheet" type="text/css" href="/skins/257424/css/style.css"/> <script src="/skins/257424/js/jquery-3.6.0.min.js"></script> <script src="/skins/257424/js/swiper.min.js"></script> <link rel="shortcut icon" href="/skins/257424/favicon.ico">  <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://www.uumote.com/jsshengaohua-Article-3438040/", "title": "實(shí)驗室酸度計及電導率儀的電極使用與維護保養", "pubDate": "2023-08-08T14:05:07", "upDate": "2023-08-08T14:05:07" }</script> <script language="javaScript" src="/js/JSChat.js"></script><script language="javaScript">function ChatBoxClickGXH() { DoChatBoxClickGXH('https://chat.chem17.com',247129) }</script><script>!window.jQuery && document.write('<script 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src="/skins/257424/images/home.png"> <p>當前位置：<a href="/">首頁(yè)</a> > <a href="/article.html">技術(shù)文章</a> > <span>實(shí)驗室酸度計及電導率儀的電極使用與維護保養</span></p> </div>   <div id="rbjpplb" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">實(shí)驗室酸度計及電導率儀的電極使用與維護保養</h1> <div id="blldzbb" class="NyNewsdetail_tips">更新時(shí)間：2023-08-08 點(diǎn)擊次數：778</div> <div id="fnhzrvl" class="NyNewsdetail_con" id="c_detail_wrap"> <section style="padding: 0px; margin: 0px; font-family: " microsoft="" font-size:="" white-space:="" background-color:=""><section style="padding: 0px; margin: 0px;"><section style="padding: 0px; margin: 0px;"><p style="padding: 0px; margin-top: 0px; margin-bottom: 0px; box-sizing: border-box; max-width: 100%; line-height: 1.75em;"><strong style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px; box-sizing: border-box; max-width: 100%;">一、 pH電極的使用維護與保養</span></strong></p></section><section style="padding: 0px; margin: 0px;">pH電極的使用<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/></section></section></section><p style="padding: 0px; margin-top: 0px; margin-bottom: 0px; box-sizing: border-box; max-width: 100%; font-family: " microsoft="" font-size:="" white-space:="" background-color:="" line-height:=""><span style="padding: 0px; margin: 0px; box-sizing: border-box; max-width: 100%;">目前，實(shí)驗室使用pH計電極大部分都是復合電極。其優(yōu)點(diǎn)是使用方便，不受氧化-還原物質(zhì)的影響，且平衡速度快。使用時(shí)應注意以下事項：<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（1）使用時(shí)應將pH電極加液口所套橡膠套和下端橡膠皮套全取下，以保持電極內kcl溶液的壓差。使用前檢查玻璃電極前端球泡，正常情況，電極應透明無(wú)裂紋，球泡內應充滿(mǎn)溶液，不能有氣泡存在。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（2）一般采用二點(diǎn)標定，6.86pH(25℃)作為第一點(diǎn)，4.00 pH (25℃)或9.18(25℃)pH 作為第二點(diǎn)（注意標定值應與該標準溶液在實(shí)際測得溫度下的標準值相一致）。標定過(guò)程中盡可能讓pH值穩定后再按確認鍵。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（3）一般pH電極性能較好時(shí)，標定后斜率在98%以上，性能略微下降應在95%以上，低于90%建議更換電極。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（4）在標定狀態(tài)下，反應較慢且穩不下來(lái)是pH電極性能下降的體現。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（5）pH復合電極不宜測有機物、油脂類(lèi)、粘稠類(lèi)等物質(zhì)。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（6）pH復合電極的使用，最容易出現問(wèn)題的是外參比。電極的液接界處，液接界處的堵塞是產(chǎn)生誤差的主要原因。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（7）用pH 電極測量溶液的值時(shí)，應充分攪動(dòng)否則就反應緩慢。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（8）冬天，環(huán)境溫度達到冰點(diǎn)，pH電極不能使用，容易發(fā)生冷爆，建議在15℃以上使用。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/></span></p><p style="padding: 0px; margin-top: 0px; margin-bottom: 0px; box-sizing: border-box; max-width: 100%; font-family: " microsoft="" font-size:="" white-space:="" background-color:=""><br data-filtered="filtered" style="padding: 0px; margin: 0px;"/></p><p style="padding: 0px; margin-top: 0px; margin-bottom: 0px; box-sizing: border-box; max-width: 100%; font-family: " microsoft="" font-size:="" white-space:="" background-color:="" line-height:=""><span style="padding: 0px; margin: 0px; box-sizing: border-box; max-width: 100%;">pH電極的維護保養<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（1）連接 pH電極的接頭、插座，應保持清潔、干燥，不可污染，并保證接觸良好，有污染時(shí)可用99%的工業(yè)酒精擦拭。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（2）第一次使用（護套內無(wú)溶液）或長(cháng)時(shí)間停用的pH 電極在使用前必須在3mol/L<span style="color: rgb(255, 0, 0);">kcl溶液中浸泡24小時(shí)。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（3）測量濃度較大的溶液時(shí)，盡量縮短測量時(shí)間，用后仔細清洗，防止被測溶液粘附在pH電極上而污染電極。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（4）電極應避免長(cháng)期浸泡在蒸餾水、蛋白質(zhì)溶液和酸性氟化物溶液中，電極應避免與有機硅油接觸。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（5）測量完，應將pH電極插到裝有<span style="color: rgb(255, 0, 0);">kcl溶液的護套中，應經(jīng)常觀(guān)察電極棒內的<span style="color: rgb(255, 0, 0);">kcl溶液的量，要及時(shí)添加，一般不要少于一半。上部塞子不測量時(shí)塞上。</span></p><p style="padding: 0px; margin-top: 0px; margin-bottom: 0px; box-sizing: border-box; max-width: 100%; font-family: " microsoft="" font-size:="" white-space:="" background-color:=""><br data-filtered="filtered" style="padding: 0px; margin: 0px;"/></p><p><br/></p><section style="padding: 0px; margin: 0px; font-family: " microsoft="" font-size:="" white-space:="" background-color:=""><section style="padding: 0px; margin: 0px;"><section style="padding: 0px; margin: 0px;"><p style="padding: 0px; margin-top: 0px; margin-bottom: 0px; box-sizing: border-box; max-width: 100%; line-height: 1.75em;"><strong style="padding: 0px; margin: 0px;"><span style="padding: 0px; margin: 0px; box-sizing: border-box; max-width: 100%;">二、電導電極的使用與維護保養</span></strong></p></section></section></section><p><br/></p><p style="padding: 0px; margin-top: 0px; margin-bottom: 0px; box-sizing: border-box; max-width: 100%; font-family: " microsoft="" font-size:="" white-space:="" background-color:="" line-height:=""><span style="padding: 0px; margin: 0px; box-sizing: border-box; max-width: 100%;"> 電導電極的使用<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（1）為保證電導率儀器的測量精度，必要時(shí)，儀器使用前，用電導率儀對電極常數進(jìn)行重新標定，同時(shí)，應定期進(jìn)行電導電極常數標定，如出現誤差較大時(shí)應及時(shí)更換電導電極。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（2）在測量高純水時(shí)應避免污染，正確選擇電導電極的常數，并最好采用密封、流動(dòng)的測量方式。否則，其電導率值將很快升高，這是因為空氣中的二氧化碳溶入高純水后，就變成了具有導電性的碳酸根離子而影響測量值。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/> （3）為確保測量準確度，電導電極使用前應用小于0.5us/cm的去離子水（或蒸餾水）沖洗2次，然后，用被測試樣沖洗后方可測量。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（4）儀器測量后顯示的值已折算到25℃測量值，如不需補償，拔去溫度電極儀器顯示25℃，測量的值就是當時(shí)的溶液的電導值。</span></p><p style="padding: 0px; margin-top: 0px; margin-bottom: 0px; box-sizing: border-box; max-width: 100%; font-family: " microsoft="" font-size:="" white-space:="" background-color:=""><br data-filtered="filtered" style="padding: 0px; margin: 0px;"/></p><p style="padding: 0px; margin-top: 0px; margin-bottom: 0px; box-sizing: border-box; max-width: 100%; font-family: " microsoft="" font-size:="" white-space:="" background-color:="" line-height:=""><span style="padding: 0px; margin: 0px; box-sizing: border-box; max-width: 100%;">電導電極的維護保養<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>電導電極的貯存<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>光亮的鉑電極、鍍鉑黑的鉑電極（長(cháng)期不使用）一般貯存在干燥地方，但鍍鉑黑的鉑電極使用前必須放在蒸餾水中數小時(shí)，經(jīng)常使用的鍍鉑黑電極可以貯存在蒸餾水中。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>電導電極的清洗</span></p><p style="padding: 0px; margin-top: 0px; margin-bottom: 0px; box-sizing: border-box; max-width: 100%; font-family: " microsoft="" font-size:="" white-space:="" background-color:="" line-height:=""><span style="padding: 0px; margin: 0px; box-sizing: border-box; max-width: 100%;">（1）可以用含有洗滌劑的溫水清洗電極上的有機成分沾污，也可用酒精清洗。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（2）鈣、鎂沉淀物最好用10%的檸檬酸清洗。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（3）光亮的鉑電極可以用軟刷子機械清洗，但在電極表面不可以產(chǎn)生刻痕，絕對不可使用螺絲起子之類(lèi)硬物清除電極表面，甚至在用軟刷清洗時(shí)也要特別注意。<br data-filtered="filtered" style="padding: 0px; margin: 0px;"/>（4）對于鍍鉑黑的鉑電極，只能用化學(xué)方法清洗，用軟刷子清洗時(shí)會(huì )破壞鍍在電極表面的鍍層（鉑黑）?？傊?，實(shí)驗室的實(shí)驗人員如果能正確使用pH電極、電導電極，并做好電極的日常維護和保養工作，不但可以延長(cháng)電極的使用壽命，而且可以大大地減少pH計、電導率儀的測量誤差，從而提高化學(xué)實(shí)驗、檢驗數據的準確性、可靠性。</span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img52.chem17.com/9/20230808/638271001271357696160.jpg" title="SH-800B.jpg" alt="SH-800B.jpg"/></p><p style="text-align: center;"><span style="color: rgb(0, 112, 192); text-decoration: underline;"><strong>盛奧華SH-800B型便攜式多參數水質(zhì)分析儀（光度法與電化學(xué)法兼容）</strong></span><br/></p><p><br/></p> </div> <div id="zrrn5xp" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/jsshengaohua-Article-3446091/">污水處理的相關(guān)知識</a></li> <li>下一篇：<a href="/jsshengaohua-Article-3426923/">實(shí)驗室多參數水質(zhì)分析儀助你成為水質(zhì)專(zhuān)家</a></li> </ul> </div> </div>   <div 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