食品科学 ›› 2005, Vol. 26 ›› Issue (3): 192-195.

• 分析检测 • 上一篇    下一篇

偶氮胂M-溴酸钾体系催化动力学光度法测定痕量铈(IV)

 周之荣, 张丽珍, 王黎   

  1. 东华理工学院
  • 出版日期:2005-03-15 发布日期:2011-09-19

Kinetic Spectrophotometric Determination of Trace Cerium(IV) on Discoloring of Arsenazo M Oxidized by Potassium Bromate

 ZHOU  Zhi-Rong, ZHANG  Li-Zhen, WANG  Li   

  1. East China Institute of Technology
  • Online:2005-03-15 Published:2011-09-19

摘要: 基于0.08mol/L的H2SO4介质中,痕量铈(IV)催化溴酸钾氧化偶氮胂M的褪色反应,建立了测定痕量铈的催化光度法。方法检出限为0.15μg/L,线性范围为0.0 ̄20μg/L。结合溶剂萃取分离技术,用于测定人发、茶叶和大米样品中的痕量铈(IV),结果满意。

关键词: 铈(IV), 动力学光度法, 偶氮胂M, 溴酸钾

Abstract: Based on the catalytic effect of trace tin on discoloring reaction of arsenazo M with potassium bromate in 0.08mol/L sulphuric acid solution, a method for the determination of trace cerium(IV) by kinetic spectrophotometry was studied. The detection limit was 0.5 μg/L and the linear range of determination is 0.0~20 μg/L for cerium(IV). Combined with polyurethane foam to absorb and separate cerium(IV), the method has been applied to the determination of trace cerium (IV) in human hair, tea and rice samples with satisfactory results.

Key words: cerium(IV), kineticspectrophotometry, arsenazo M, potassium bromate