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常用甲醛检测方法比较

发布时间:2017-06-07 10:10:00 分类:新闻动态 来源: 点击:次

常用甲醛检测方法比较 常用甲醛检测方法比较   室内,汽内等空气环境内甲醛含量甲醛检测可分为: (1)电化学传感器'>传感器检测仪法  (2)酚试剂分光光度法  (3)气相色谱法  (4)乙酰丙酮分光光度法   (5)AHMT 分光光度法。  本钱较低的且利用最广泛快捷检测方法有电化学传感器发和酚试剂分光光度法。  两种丈量方法的比较:  电化学传感器检测法:开机直接丈量,丈量数据直接显示在LCD屏幕上,操作简单方便。同环境每次丈量数据1致,建议屡次丈量的用户采取。  酚试剂分光光度法:空气中的甲醛与酚试剂反应生成嗪,嗪在酸性溶液中被高铁离子氧化成蓝绿色化合物,根据色彩深浅,比色定量。根据甲醛与酚试剂反应生成的色彩和标准卡比色定量。该方法优点是次数少的丈量本钱低。缺点是操作麻烦,每次由于操作和取样方面的缘由丈量结果差别很大。常常使用每次需要试剂与比色,推

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常用甲醛检测方法比较