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絮凝法测定氨氮为什么不显色
更新时间: 2020-07-04 00:00:00  

操作过程有错误或硝化效果好。

操作注意事项:

1、絮凝过程中PH的控制一定要保证在10、5左右,加完后需要混合均匀有助于絮凝,因为氢氧化锌絮凝效果较难达到,最后进行测试上清液;

2、纳氏试剂的配置要求过夜放置,不能现配先用;

3、酒石酸钾钠不能不加,如果依旧不显色说明水中没有氨氮,硝化效果较好。

关键词: 测定 为什么

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