高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (11): 1457.

• 论文 • 上一篇    下一篇

催化光度法测定超痕量亚硝酸根

郑肇生, 吴和舟, 赵文忠   

  1. 福州大学化学系, 福州, 350002
  • 收稿日期:1990-08-06 出版日期:1991-11-24 发布日期:1991-11-24
  • 通讯作者: 郑肇生
  • 基金资助:

    福建省自然科学基金

Catalytic Spectrophotometric Determination of Ultratrace Amounts of Nitrite

Zheng Zhao-sheng, Wu He-zhou, Zhao Wen-zhong   

  1. Department of Chemistry, Fuzhou University, Fuzhou, 350002
  • Received:1990-08-06 Online:1991-11-24 Published:1991-11-24

摘要: 迄今为止,有关动力学法测定亚硝酸根的报道甚少,笔者实验发现,在磷酸介质中,以溴酸钾氧化中性红,亚硝酸根具有高催化活性,据此,我们研究了适宜的催化反应条件,以及共存离子的影响。

关键词: 催化光度法, 中性红, 亚硝酸根

Abstract: A new catalytic spectrophotometric method for determining ultratrace amounts of NO2- has been developed. The method is based on the catalytic oxidation of neutral red by potassium bromate in the solution of diluted H3PO4.The sensitivity of the method is 2. 6 ×10-12g/mLof nitrogen in NO2-(△A=0. 001, b=1 cm), the linear range of determination is 2. 0× 10-4-8.0×10-3pg/mLfor NO2-. The method has been used to determine trace NO2- in water samples.

Key words: Catalytic spectrophotometric method, Neutral red, Nitrite

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