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化学学报
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化学学报 ›› 1958, Vol. 24 ›› Issue (4): 329-332. 上一篇    下一篇

论文

水中硝酸盐的快速测定法

徐墨耕, 闻根芳, 任云峰   

  1. 中国科学院水生生物研究所
  • 投稿日期:1958-01-07 发布日期:2013-06-03

RAPID DETERMINION OF NITRATES IN FRESH WATERS

HSU ME-KENG, WEN KEN-FANG, JEN YUNG FENG   

  1. Institule of Hydrobiology, Academia Sinica
  • Received:1958-01-07 Published:2013-06-03

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本文叙述水中微量硝酸盐的快速测定法。主要采用Bray之粉剂,加入硫酸铜作催化剂(Cu++16.3微克/10毫升)和加长振荡时间控制硝酸盐的还原程度,致使灵敏度增加。用光电比色计可测至0.02 ppm硝酸根中之氮,用纳氏管可到0.005 ppm。再现性及稳定性均好。误差不超过5%。

This communication reports the result of a study of Nelson method with the purpose of being applied to the determination of nitrates in fresh waters. According to otu findings, firstly, a trace of copper sulfate should be added to the acetic acid in order to enhence the sensitivity and reproducibility; secondly, nitrites should be removed by using of sodium azide if it is present together with nitrate in the sample.