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class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">pH計基礎知識：(結構、原理、使用方法及維護)</h1> <div id="uhs3ht8" class="NyNewsdetail_tips">更新時(shí)間：2023-11-21 點(diǎn)擊次數：1606</div> <div id="phcoep8" class="NyNewsdetail_con"> <div>　　<strong>pH計</strong>是一種常用的測量溶液酸堿度的儀器，廣泛應用于環(huán)保、食品、化工、醫藥等領(lǐng)域。下面將介紹pH計的基本原理、應用領(lǐng)域以及操作方法，幫助大家更好地了解和使用pH計。</div><div>　　</div><p style="text-align: center;"><img src="https://img54.chem17.com/9/20231121/638361885110859628274.png" alt="pH計" width="429" height="329" align="middle" /></p><p> </p><div>　　一、基本原理</div><div>　　</div><div>　　pH計的工作原理是基于玻璃電極和氫離子選擇性電極之間的電勢差。當溶液中的氫離子濃度發(fā)生變化時(shí)，玻璃電極和氫離子選擇性電極之間的電勢差也會(huì )隨之改變。通過(guò)測量這個(gè)電勢差，就可以計算出溶液的pH值。</div><div>　　</div><div>　　1、玻璃電極：玻璃電極是pH計的核心部件，主要由一個(gè)玻璃管和一個(gè)金屬球組成。玻璃管內裝有溶液，金屬球與玻璃管之間有一個(gè)薄膜。當溶液中的氫離子濃度發(fā)生變化時(shí)，薄膜上的電荷也會(huì )隨之改變，從而影響玻璃電極和氫離子選擇性電極之間的電勢差。</div><div>　　</div><div>　　2、氫離子選擇性電極：氫離子選擇性電極是一個(gè)由特殊材料制成的半透膜，可以允許氫離子通過(guò)，而阻止其他離子通過(guò)。當溶液中的氫離子濃度發(fā)生變化時(shí)，氫離子選擇性電極內部的電勢差也會(huì )隨之改變。</div><div>　　</div><div>　　二、應用領(lǐng)域</div><div>　　</div><div>　　1、環(huán)保：pH計可以用于監測廢水、廢氣等污染物的酸堿度，以便采取相應的處理措施。</div><div>　　</div><div>　　2、食品：在食品加工過(guò)程中，pH計可以用于監測原料、半成品和成品的酸堿度，以保證食品的安全性和口感。</div><div>　　</div><div>　　3、化工：在化工生產(chǎn)過(guò)程中，pH計可以用于監測反應液的酸堿度，以控制反應的進(jìn)行和產(chǎn)物的質(zhì)量。</div><div>　　</div><div>　　4、醫藥：在藥物研發(fā)和生產(chǎn)過(guò)程中，pH計可以用于監測溶液的酸堿度，以保證藥物的穩定性和有效性。</div><div>　　</div><div>　　三、pH計的操作方法</div><div>　　</div><div>　　1、開(kāi)機：按下pH計的開(kāi)關(guān)鍵，等待儀器自檢并進(jìn)入工作狀態(tài)。</div><div>　　</div><div>　　2、校準：使用標準緩沖溶液對pH計進(jìn)行校準，以確保測量結果的準確性。</div><div>　　</div><div>　　3、測量：將pH計的電極插入待測溶液中，等待數秒至數十秒，直至儀器顯示穩定的pH值。</div><div>　　</div><div>　　4、清洗：測量完成后，用蒸餾水清洗電極，然后用軟布擦干，存放在干燥處。</div> </div> <div id="nvwhdea" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-3549810.html">實(shí)驗室余氯分析儀在水質(zhì)監測中的應用</a></li> <li>下一篇：<a href="/Article-3535013.html">在線(xiàn)PH計安裝位置的選擇與優(yōu)化</a></li> </ul> </div> </div>   <div id="jwhcstu" class="ly_foot"> <div id="b8ufawh" class="ly_Ftmain"> 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