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id="4qkkiomnnyce" class="news-aggregate-mn"> <div id="4qkkiomnnyce" class="news-aggregate-panel"> <div id="4qkkiomnnyce" class="panel-bd"> <div id="4qkkiomnnyce" class="news-detail news-aggregate-detail"> <div id="4qkkiomnnyce" class="news-detail-title"> <h1>溶解氧分析儀怎么校準(zhǔn)</h1> <p> <span>瀏覽量：1556</span>  <span>發(fā)布時(shí)間：2021-12-24 17:37:16</span> </p> </div> <div id="4qkkiomnnyce" class="news-detail-view"> <p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">溶解氧分析儀是一款智能型儀器，該儀器采用人性化設(shè)計(jì)，OLED低功耗液晶屏顯示，操作直觀易懂，具有中英文可選，可用于電廠、化工、冶金、環(huán)保、制藥、生化、食品和自來(lái)水等溶液在實(shí)驗(yàn)室的測(cè)量與存儲(chǔ)。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">溶解氧分析儀使用前應(yīng)該怎么校準(zhǔn)呢，今天給大家介紹一下：</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">1、用校正液校準(zhǔn)</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">在*家環(huán)境保護(hù)行業(yè)標(biāo)準(zhǔn)HJ/T 99-2003《溶解氧(DO)水質(zhì)自動(dòng)分析儀技術(shù)要求》中，推薦的校準(zhǔn)方法和步驟如下。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">① 校正液的配制。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">零點(diǎn)校正液：將約25g的無(wú)水Na2SO3溶于蒸餾水中，加蒸餾水至500mL。使用時(shí)配制。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">量程校正液：在(25±0. 5 )℃下，以約1L/min的流量將空氣通入蒸餾水[應(yīng)該把盛蒸餾水的容器放在(25±0. 5)℃的水浴中]，并使其中的溶解氧達(dá)到飽和，靜置一段時(shí)間后使溶解氧達(dá)到穩(wěn)定(通常，200mL水需要5~10min; 500mL水需要10~20min)。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">說(shuō)明:溶解氧的濃度隨大氣壓的變化而不同，所以采用大氣壓補(bǔ)償。另外，在測(cè)定高鹽度試樣時(shí)，在配制溶解氧飽和水時(shí)，應(yīng)根據(jù)試樣中鹽類(lèi)的摩爾濃度添加NaCl試劑。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">②校正。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">零點(diǎn)校正：將電*浸入零點(diǎn)校正液，將指示值調(diào)整為零點(diǎn)。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">量程校正：將電*浸入量程校正液，在用磁攪拌器攪拌的同時(shí)，待顯示值穩(wěn)定后，測(cè)定量程校正液的溫度(準(zhǔn)確至±1℃)，根據(jù)飽和溶解氧濃度值調(diào)整顯示值。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;"><br/></span></p><p style="line-height: 1.75em; text-align: center;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;"><img src="/Public/Uploads/image/20211224/1640338613908298.jpg" title="溶解氧分析儀.jpg" alt="溶解氧分析儀.jpg" width="551" height="450" border="0" vspace="0" style="width: 551px; height: 450px;"/></span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;"><br/></span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">說(shuō)明:顯示值一般隨試樣的流速變化而變化，因此攪拌速度應(yīng)按照生產(chǎn)商規(guī)定的方法，使電*表面的液體流速保持恒定。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">調(diào)節(jié):交替進(jìn)行零點(diǎn)校正和量程校正操作，調(diào)節(jié)分析儀直至校正液的測(cè)定值與顯示值之差在±0.25mg/L以?xún)?nèi)為止。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">2、在空氣中校準(zhǔn)</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">這種方法簡(jiǎn)便易行，是某些儀表使用說(shuō)明書(shū)中推薦的方法。注意在取出傳感器探頭置于空氣中進(jìn)行校準(zhǔn)前，先要用脫鹽水將其清洗干凈，再用濾紙吸干表面水分。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">對(duì)于μg/L級(jí)微量溶解氧分析來(lái)說(shuō)，這種校準(zhǔn)方法準(zhǔn)確度低，不宜采用。</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">3、用被測(cè)介質(zhì)來(lái)做校準(zhǔn)</span></p><p style="line-height: 1.75em;"><span style="font-family: 微軟雅黑, "Microsoft YaHei"; font-size: 14px;">這種校準(zhǔn)方法主要用于生物發(fā)酵過(guò)程。在消毒完成后，向未接種的介質(zhì)中充入潔凈的壓縮空氣，使介質(zhì)中的溶解氧達(dá)到飽和狀態(tài)，然后用傳感器來(lái)校準(zhǔn)100%濃度，再用百分比濃度來(lái)檢測(cè)和控制整個(gè)發(fā)酵過(guò)程。</span></p><p><br/></p> </div> </div> </div> </div> </div> <div id="4qkkiomnnyce" class="news-aggregate-sd"> <div id="4qkkiomnnyce" class="xwtji"> <div id="4qkkiomnnyce" class="panel-hd"><span>產(chǎn)品推薦</span></div> <div id="4qkkiomnnyce" class="panel-xwtj"> <ul class="news-xiw"> <li><a href="/p-11411.html">HY106型個(gè)人聲暴露計(jì)</a> </li><li><a href="/p-11410.html">德國(guó)MAHR(馬爾) MARSURF PS10/PS 10 C2表面粗糙度測(cè)量?jī)x</a> </li><li><a href="/p-11409.html">英國(guó)Burkard Hirst 孢子采樣</a> </li><li><a href="/p-11408.html">LabSen241-3S微量玻璃pH電極</a> </li><li><a href="/p-11407.html">LabSen751鈦合金食品穿刺pH電極</a> </li><li><a 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