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<p><span>水中的總氮含量是衡量水質(zhì)的重要指標之一。其測定有助于評價水體被污染和自凈狀況。大量生活污水、農(nóng)田排水或含氮工業(yè)廢水排入水體，使水中有機氮和各種無機氮化物含量增加，生物和微生物類大量繁殖，消耗水中溶解氧，使水體質(zhì)量惡化。胡泊、水庫中含有超標的的氮、磷類物質(zhì)時，造成浮游植物繁殖旺盛，出現(xiàn)富營養(yǎng)化狀態(tài)。</span></p><p><span><br/></span></p><p><span>原理：采用高溫高壓、堿性條件下氧化劑將水樣中氨氮、亞硝酸鹽氮及有機氮氧化成硝酸鹽，在濃硫酸介質(zhì)中，硝酸鹽與顯色劑反應生成淺黃色的硝基化合物。該化合物的吸光度與水樣中總氮含量成正比，通過測量該化合物的吸光度，從而得到水樣中總氮的含量。</span></p><p><span><br/></span></p><p><span>主要應用場景有企業(yè)雨水、污水的監(jiān)測，市政管網(wǎng)、提升泵站、地下水、河水、湖泊水、海水等水質(zhì)中總磷含量的監(jiān)測。</span></p><p><br/></p> </div> <div id="wowgyyywegmg" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-3170241.html">總磷分析原理和用途</a></li> <li>下一篇：<a href="/Article-3170236.html">高錳酸鹽指數(shù)分析原理和用途</a></li> </ul> </div> </div>   <div id="wowgyyywegmg" class="ly_foot"> <div id="wowgyyywegmg" class="ly_Ftmain"> <div id="wowgyyywegmg" class="ly_FtLeft"> <div id="wowgyyywegmg" class="Ft_nav"><a href="/">首頁</a><a href="/aboutus.html" target="_blank" rel="nofollow">關(guān)于我們</a><a href="/products.html" 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