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再生水中消毒副产物——卤乙酸的测定方法研究

Keywords: 再生水,消毒副产物,卤乙酸,气相色谱/质谱

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Abstract:

参照美国国家环保局(USEPA)推荐的饮用水卤乙酸类消毒副产物测定方法(Method552.3),通过优化该方法的预处理条件和改变检测方法,提出了酸化萃取-衍生化-中和萃取-GC-MS测定再生水中卤乙酸含量的分析方法,并分析了北方某市再生水中4种卤乙酸类消毒副产物含量。结果表明,该方法适用于我国再生水水质,能够有效地消除再生水中共存污染物的干扰;其相对标准偏差(n=7)小于10%,方法的精密度较好;检出限与USEPA方法基本一致;样品加标回收率满足USEPA6251B标准方法中(100±30)%要求;再生水中的卤乙酸比自来水高出几十倍,对环境和人类存在一定的潜在危害。

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