高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (11): 1199.

• 研究论文 • 上一篇    下一篇

没食子酸-过氧化氢-甲醛体系中Co(Ⅱ)和Mn(Ⅱ)的化学发光同时测定

林守麟, 刘永庆   

  1. 中国地质大学应用化学系, 430072
  • 收稿日期:1989-07-17 出版日期:1990-11-24 发布日期:1990-11-24
  • 通讯作者: 林守麟

The Simultaneous Determination of Co(Ⅱ) and Mn(Ⅱ) by Chemilumincscencc in the System of Gallic Acid-Formaldehyde-Hydrogen Pcroxide

Lin Soulin, Liu Yongqing   

  1. Department of Applied Chemistry, China University of Geosciences, Wuhan, 430072
  • Received:1989-07-17 Online:1990-11-24 Published:1990-11-24

摘要: 在较大量硫脲存在下,没食子酸-过氧化氢-甲醛体系中化学发光的动力学性质发生了变化,出现多峰现象,藉此实现了Co(Ⅱ)和Mn(Ⅱ)的化学发光同时测定。该法灵敏度高,选择性好,Co(Ⅱ)的测定范围是3×10-5~2ppm,Mn(Ⅱ)是0.03~10ppm。

关键词: 没食子酸-过氧化氢-甲醛体系, 化学发光, Co(Ⅱ)、Mn(Ⅱ)同时测定

Abstract: The chemiluminescent oxidation of gallic acid and formaldehyde in the presence of thiourea by alkaline H2O2 is found to be applied to the simultaneous determination of cobalt and manganese ions. The proposed method is highly selective to those ions. Detection limits are found to be 1. 5× 10-5 ppm for CO( Ⅱ ) and 0. 02 ppm for Mn( Ⅱ ). Relative standard deviations are 1% for 1× 10-3 ppm Co( Ⅱ ) and 1. 8% for 0. 4 ppm Mn( Ⅱ ) respectively.

Key words: The system of gallic acid-hydrogenperoxide-formaldehyde, Chemiluminescence, Cobalt, Manganese, Simultaneous determination

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