高等学校化学学报

高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (12): 1861.

• 论文 • 上一篇    下一篇

增效试剂在动力学分析法中的应用研究(Ⅰ)──锰(Ⅱ)-高碘酸钾-氨三乙酸-PAN-TritonX-100催化体系

郑肇生, 景卫国   

  1. 福州大学化学系, 福州, 350002
  • 收稿日期:1994-12-15 修回日期:1995-04-21 出版日期:1995-12-24 发布日期:1995-12-24
  • 通讯作者: 郑肇生,男,58岁,教授.
  • 作者简介:郑肇生,男,58岁,教授.
  • 基金资助:

    福建省自然科学基金

A Study of Enhancing Agent in Kinetic Analytical Method(Ⅰ)──A New Mn(Ⅱ)-Potassium Periodate-Nitrilo Triacetic acid -1-(2-pyridylazo)-2-naphthol-Triton X-100 Catalytic Spectrophotometric System

ZHENG Zhao-Sheng, JING Wei-Guo   

  1. Department of Chemistry, Fuzhou University, Fuzhou, 350002
  • Received:1994-12-15 Revised:1995-04-21 Online:1995-12-24 Published:1995-12-24

PDF (PC)

被引次数

26

摘要： 报道了以TritonX-100为增溶剂,高碘酸钾氧化PAN催化光度法测定痕量锰的新体系。方法的检出限为3.6×10-3μg/mL,精密度为2.4%(n=9),线性范围为0.10～1.3μg/25mL,可用于谷物样品中锰的测定。

关键词: 催化光度法, 表面活性剂, 1-(2-吡啶偶氮)-2-萘酚, 锰

Abstract: The indicator reactions for using in kinetic spectrophotometry are necessarily those reactions of homogeneous system.If the reactants or the products are insoluble,these reactions can not be monitored by spectrophotometry.The authors change non-homogeneous systems into analog-homogeneous systems extending the range of selecting indicator reactions of kinetic spectrophotometry by adding surfactant to insoluble reactions with the solubilizing effect of surfactant.Anew catalytic spectrophotometric system for the determination of trace of Mn(Ⅱ)has been developed.This method is based on the catalytic oxidation of 1-2-pyridylazo)-2-naphthol by potassium periodate in the presence of Triton X-100 as a solubilized agent.The detection limit is 3.6×10-3μg/mL,the relative standard deviation is 2.4%,the linear range of determination is 0.1～1.3 μg/25 mLfor Mn(Ⅱ). This method has been successfully used to determine Mn in cereal samples.

Key words: Catalytic spectrophotometry, Surfactant, 1-(2-Pyridylazo)-2-naphthol, Manganese

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