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class="NyNewsdetail_title">GNST-900S總氮測定儀的意義和測定原理</h1> <div id="trkh4jg" class="NyNewsdetail_tips">更新時間：2024-12-31 點擊次數(shù)：207</div> <div id="trkh4jg" class="NyNewsdetail_con"> <div>　　總氮包括溶液中所有含氮化合物，即亞硝酸鹽氮、硝酸鹽氮、無機(jī)鹽氮、溶解態(tài)氮及大部分有機(jī)含氮化合物中的氮的總和?？偟欠从乘w富營養(yǎng)化的主要指標(biāo)。太湖水污染事件的發(fā)生，讓監(jiān)管部門重新認(rèn)識到了總氮的危害性。掌握總氮排放量、分布狀況以及主要來源，對控制水體富營養(yǎng)化、改善水質(zhì)具有十分重要的意義。<br /> </div><div>　　樣品預(yù)處理：根據(jù)分析要求，可能需要對水樣進(jìn)行過濾、酸化或堿化等處理步驟，以去除干擾物質(zhì)并保證結(jié)果的準(zhǔn)確性。消解處理：將水樣中的有機(jī)氮轉(zhuǎn)化為可測量的形式，這通常通過化學(xué)消解實現(xiàn)，即在高溫高壓條件下，用強(qiáng)氧化劑(如過硫酸鉀)將有機(jī)氮氧化為無機(jī)氮形式。測定氮的不同形式：根據(jù)不同的標(biāo)準(zhǔn)方法，可能采用光度法、電化學(xué)法或其他方法來分別測定不同形態(tài)的氮(如NH??、NO??、NO??)。計算總氮含量：將上述測定結(jié)果匯總計算得出水樣中的總氮含量。<br /> </div><div>　　具有準(zhǔn)確、可靠的特點，被廣泛應(yīng)用于水質(zhì)污染監(jiān)測、自來水廠進(jìn)水處理、工業(yè)廢水排放監(jiān)管等領(lǐng)域。可在短時間內(nèi)對廢水中的含氮物質(zhì)進(jìn)行準(zhǔn)確的測量。這種精準(zhǔn)的測量結(jié)果，讓污染者無法逃避排放問題。這對于保護(hù)環(huán)境、改善水質(zhì)具有非常重要的作用。<br /> </div> </div> <div id="trkh4jg" class="ly_PrevNext"> 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