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class="NyNewsdetail_tips">更新時(shí)間：2017-08-08 點(diǎn)擊次數：2436</div> <div id="bd8lmiie" class="NyNewsdetail_con"> <p><span style="font-family:times new roman; font-size:14px"><strong>工作原理</strong></span></p><p><span style="font-family:times new roman; font-size:14px"> 微波密封消解COD測定裝置是用頻率為2450MHZ的電磁波(稱(chēng)為微波)能量來(lái)加熱反應液，在高頻微波能的作用下，反應液分子產(chǎn)生高速磨擦運動(dòng)，使其溫度迅速升高，另外采用密封消解方式，使其消解罐內部壓力迅速提高到約203kPa。因此不僅縮短了消解時(shí)間，而且還可以抑制氯離子被重鉻酸鉀氧化成氯氣，若加入適量的硫酸汞作為掩蔽劑，則可實(shí)現對高氯水的COD測定。整個(gè)消解過(guò)程免冷卻水，減少了冷水管安裝及停水的煩惱。</span></p><p><span style="font-family:times new roman; font-size:14px"> 水樣在微電腦控制下，在強酸性溶液中，用一定量的重鉻酸鉀氧化水樣中還原性物質(zhì)，過(guò)量的重鉻酸鉀以試亞鐵靈為指示劑，用硫酸亞鐵銨進(jìn)行滴定，計算出COD Cr值。亦可用比色法，在波長(cháng)600nm處直接測定反應液中三價(jià)鉻濃度，求得水樣的COD Cr值。</span></p> </div> <div id="bd8lmiie" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-1323566.html">COD微波消解儀技術(shù)指標</a></li> <li>下一篇：<a href="/Article-1323472.html">COD微波消解儀產(chǎn)品介紹</a></li> </ul> </div> </div>   <div id="bd8lmiie" class="ly_foot"> <div 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