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class="ny_newsdetail clear"> <h1 class="ny_newsdetail_title">微量溶氧儀的標(biāo)定方法</h1> <div id="hvjh9xd" class="ny_newsdetail_tips">更新時(shí)間：2021-10-15 | 點(diǎn)擊率：2208</div> <div id="hvjh9xd" class="ny_newsdetail_con"> <div>　　微量溶氧儀是用來(lái)測(cè)定水中溶解氧含度的裝置，當(dāng)氧透過(guò)隔膜時(shí)被工作電極還原，產(chǎn)生擴(kuò)散電流，通過(guò)測(cè)量此電流來(lái)了解水中溶解氧的濃度。針對(duì)不同的溶解氧濃度所使用的電極不同，電極分為極譜式電池和原電池兩種，工作原理都是一樣的。目前市場(chǎng)上銷(xiāo)售的基本都為防水型溶解氧測(cè)定儀，達(dá)到100%防水效果。在很多行業(yè)中水中含氧量的測(cè)定都十分重要，例如水產(chǎn)養(yǎng)殖、污水處理等行業(yè)。在傳感器內(nèi)部還有一個(gè)內(nèi)置電熱調(diào)節(jié)傳感器，可以在測(cè)量過(guò)程中減少因?yàn)闇囟炔町惗斐蓽y(cè)量結(jié)果不準(zhǔn)確情況的發(fā)生。目前微量溶氧儀的使用越來(lái)越簡(jiǎn)單，測(cè)定時(shí)只需要按照說(shuō)明書(shū)上操作即可。<br /> </div><div>　<strong>　微量溶氧儀</strong>的標(biāo)定方法：<br /> </div><div>　　(1)微量溶氧儀標(biāo)準(zhǔn)溶液標(biāo)定法：標(biāo)準(zhǔn)溶液標(biāo)定一般采用兩點(diǎn)標(biāo)定，即零點(diǎn)標(biāo)定和量程標(biāo)定。零點(diǎn)標(biāo)定溶液可采用2%的Na2SO3溶液。量程標(biāo)定溶液可根據(jù)儀表測(cè)量量程選擇4M的KCl溶液(2mg/L);50%的甲醇溶液(21.9mg/L)。<br /> </div><div>　　(2)微量溶氧儀現(xiàn)場(chǎng)取樣標(biāo)定法(Winkler法)：在微量溶氧儀實(shí)際使用中，多采用Winkler方法對(duì)微量溶氧儀進(jìn)行現(xiàn)場(chǎng)標(biāo)定。使用該方法時(shí)存在兩種情況：取樣時(shí)儀表讀數(shù)為M1，化驗(yàn)分析值為A，對(duì)儀表進(jìn)行標(biāo)定時(shí)儀表讀數(shù)仍為M1，這時(shí)只須調(diào)整儀表讀數(shù)等于A即可;取樣時(shí)儀表讀數(shù)為M1，化驗(yàn)分析值為A，對(duì)儀表進(jìn)行標(biāo)定時(shí)儀表讀數(shù)改變?yōu)镸2，這時(shí)就不能將調(diào)整儀表讀數(shù)等于A，而應(yīng)將儀表讀數(shù)調(diào)整為1MA×M2。</div> </div> <div id="hvjh9xd" class="ny_PrevNext"> <div id="hvjh9xd" class="Prev">上一篇： <a href="/Article-2814311.html">PH酸度計(jì)的使用維護(hù)</a></div> <div id="hvjh9xd" class="Next">下一篇： <a href="/Article-2793150.html">溶氧分析儀的工作原理</a></div> </div> </div> </div> </div> </div>   <div id="hvjh9xd" class="pc_foot"> <div id="hvjh9xd" class="pc_ft_main w1200 clear"> <div id="hvjh9xd" class="ft_list"> <ul> <li><b>關(guān)于我們</b><a href="/aboutus.html">公司簡(jiǎn)介</a><a href="/news.html">新聞動(dòng)態(tài)</a><a href="/article.html">技術(shù)文章</a></li> <li><b>產(chǎn)品展示</b> <a 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