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點(diǎn)擊次數(shù)：2893</div> <div id="fl5fhrt" class="NyNewsdetail_con"> <p><span style="font-size:10.5000pt"><span style="font-family:宋體"> 酸度計(jì)或離</span></span><span style="font-size:10.5000pt"><span style="font-family:宋體">子濃度計(jì)。常規(guī)檢驗(yàn)使用的儀器，至少應(yīng)當(dāng)?shù)?.1pH單位，pH（<strong>PH儀表</strong>）范圍從0至14。如有特殊需要，應(yīng)使用精度更高的儀器。 </span></span></p><p><strong><span style="font-size:10.5pt"><span style="font-family:宋體">玻璃電極</span></span></strong><span style="font-size:10.5000pt"><span style="font-family:宋體">與甘汞電極。 </span></span></p><p><span style="font-size:10.5000pt"><span style="font-family:宋體"> 樣品保存現(xiàn)場(chǎng)測(cè)定。否則，應(yīng)在采樣后把樣品保持在0~4</span></span><span style="font-size:10.5000pt"><span style="font-family:宋體">℃</span></span><span style="font-size:10.5000pt"><span style="font-family:宋體">，并在采樣后6h之內(nèi)進(jìn)行測(cè)定。 </span></span></p><p><span style="font-size:10.5000pt"><span style="font-family:宋體">步驟 </span></span></p><p><span style="font-size:10.5000pt"><span style="font-family:宋體"> 儀器校準(zhǔn)：操作程序按儀器使用說(shuō)明書(shū)進(jìn)行。先將水樣與標(biāo)準(zhǔn)溶液調(diào)到同一溫度，記錄測(cè)定溫度，并將儀器溫度補(bǔ)償旋鈕調(diào)至該溫度上。 </span></span></p><p><span style="font-size:10.5000pt"><span style="font-family:宋體"> 用標(biāo)準(zhǔn)溶液校正儀器，該標(biāo)準(zhǔn)溶液與水樣pH相差不超過(guò)2個(gè)pH單位。從標(biāo)準(zhǔn)溶液中取出</span></span><strong><span style="font-size:10.5pt"><span style="font-family:宋體">電極</span></span></strong><span style="font-size:10.5000pt"><span style="font-family:宋體">，*沖洗并用濾紙吸干。再將電極浸入第二個(gè)標(biāo)準(zhǔn)溶液中，其pH大約與第1個(gè)標(biāo)準(zhǔn)溶液相差3個(gè)pH單位，如果儀器響應(yīng)的示值與第2個(gè)標(biāo)準(zhǔn)溶液的pH(S)值之差大于0.1pH單位，就要檢查儀器、電極或標(biāo)準(zhǔn)溶液是否存在問(wèn)題。當(dāng)三者均正常時(shí)，方可用于測(cè)定樣品。</span></span></p><p><span style="font-size:10.5000pt"><span style="font-family:宋體"> 樣品測(cè)定，測(cè)定樣品時(shí)，先用蒸餾水認(rèn)真沖洗電極，再用水樣沖洗，然后將</span></span><strong><span style="font-size:10.5pt"><span style="font-family:宋體">電極</span></span></strong><span style="font-size:10.5000pt"><span style="font-family:宋體">浸入樣品中，小心搖動(dòng)或進(jìn)行攪拌使其均勻，靜置，待讀數(shù)穩(wěn)定時(shí)記下pH值。 </span></span></p> </div> <div id="55j5zb5" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/szhcy-Article-2052470/">電導(dǎo)率水質(zhì)自動(dòng)分析儀檢驗(yàn)方法</a></li> <li>下一篇：<a href="/szhcy-Article-2050264/">PH標(biāo)準(zhǔn)緩沖溶液（簡(jiǎn)稱(chēng)標(biāo)準(zhǔn)溶液）的配制方法</a></li> </ul> </div> </div>   <div id="bdnv5rf" class="foot_box"> <div id="75hfbp5" class="foot_t"> <div id="xzrj5pv" class="w1200"> <a href="/">網(wǎng)站首頁(yè)</a>　|　<a href="/aboutus.html">關(guān)于我們</a>　|　<a href="/products.html">產(chǎn)品中心</a>　|　<a href="/news.html">新聞動(dòng)態(tài)</a>　|　<a href="/article.html">技術(shù)文章</a>　|　<a href="/honor.html">榮譽(yù)資質(zhì)</a>　|　<a href="/order.html" target="_blank">在線(xiàn)留言</a>　|　<a href="/contact.html">聯(lián)系我們</a> <span><a href="javascript:;" class="toTop"></a></span> </div> </div> <div id="bfvhh7j" class="foot_b"> <div id="vptrdtn" class="w1200"> <div id="jdnbl5n" class="f_b_t clear"> <div 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