四川农业大学学报 ›› 1998, Vol. 16 ›› Issue (03): 352-354.doi: 10.16036/j.issn.1000-2650.1998.03.016

• 研究论文 • 上一篇    下一篇

痕量铁(Ⅲ)的催化比色测定

陈华萍   

  1. 四川农业大学基础部, 雅安市 625014
  • 收稿日期:1998-02-19 出版日期:1998-09-30 发布日期:2017-04-21

CATALYTIC COLORIMETRY DETERMINATION OF TRACE IRON(Ⅲ)

Chen Huaping   

  1. Department of Basic Sciences, Sichuan Agricultural University, Yaan, Sichuan, China 625014
  • Received:1998-02-19 Online:1998-09-30 Published:2017-04-21

摘要: 在硫酸介质中,抗坏血酸存在下,铁(Ⅲ)催化溴酸钾氧化结晶紫褪色,据此,建立了一种测定痕量铁(Ⅲ)的简单、灵敏的分析方法-催化比色法。该法线性范围是8~80ng/25mL,灵敏度为3.2×10-10g/mL。用于水及人发中痕量铁的测定,结果满意。

关键词: 溴酸钾, 结晶紫, 催化比色, 铁(Ⅲ)测定

Abstract: A simple and sensitive catalytic colorimetry has been developed for determining trace Fe(Ⅲ). It is based on the catalysis of Fe(Ⅲ) to decoloration of crystal violet oxidized with potassium bromate in diluted sulfuric acid medium in the presence of ascorbic acid. The linear range of determination is from 8 to 80 ng/25mL Fe(Ⅲ). The sensitivity is 3.2×10-10 g/mL. The method has been applied to the determination of trace Fe(Ⅲ) in natural water and human hair with satisfactory results.

Key words: POTASSIUM BROMATE, CRYSTAL VIOLET, CATALYTIC COLORIMETRY, DETERMINATION IRON(Ⅲ)

中图分类号: 

  • O614.811