高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (2): 209.

• 论文 • 上一篇    下一篇

一种新的流动注射电化学发光分析方法及硫离子的分析测定研究

郑行望, 章竹君   

  1. 陕西师范大学化学系, 西安 710062
  • 收稿日期:1998-04-28 出版日期:1999-02-24 发布日期:1999-02-24
  • 通讯作者: 章竹君
  • 作者简介:郑行望,男,35岁,讲师.
  • 基金资助:

    国家自然科学基金(批准号:39730160)

The Investigation of a New Flowinjection Analysis Electrogenerated Chemiluminescence Method and the Determination of S2-

ZHENG Xing-Wang, ZHANG Zhu-Jun   

  1. Department of Chemistry, Shaanxi Normal University, Xi'an, 710062
  • Received:1998-04-28 Online:1999-02-24 Published:1999-02-24

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被引次数

38

摘要： 设计了一种用于流通体系的电解池,并以恒电流电解法与流动注射技术相结合,在线定量电解产生不稳定试剂次溴酸根,使其浓度和反应活性得以在线控制,稳定地应用于化学发光分析.在此基础上,研究了BrO-在pH=9.60Na2CO3-NaHCO3缓冲介质中氧化鲁米诺弱化学发光反应的分析特性,并基于硫离子对该弱化学发光反应体系的发光强度的增敏作用,建立了一种新的测定S2-的流动注射电化学发光分析法.采用该方法测定S2-的线性范围为3.10×10-7～9.30×10-5mol/L,检出限为1.00×10-7mol/L,相对标准偏差为2%[n=11,c(S2-)=3.10×10-6mol/L]

关键词: 电化学发光, 流动注射分析, S2-测定, 电生次溴酸根, 鲁米诺

Abstract: By contriving a novel electrolytic flowthrough cell, BrO-, an unstable reagent, had been online produced with galvanostatic electrolysis method and flowinjection technique in alkaline KBr solution. The concentration of BrO-can be online adjusted by this flow system. At the same time, it was found that sulfide had a strong enhanced effect on the emission intensity of CLreaction between BrO-and LuminoLIn pH=9.60 Na2CO3NaHCO3medium. Based on this observation, a new flowinjection analysis ECL method for the determination of sulfide ion has been proposed in this paper. The detection limit of sulfide ions was 0.100 mol/L, the linear range of determination sulfide ions was 0.310-93.0 mol/L with the relative standard deviation of 2%[c(S2-)=3.10mol/L, n=11].

Key words: Electrogenerated chemiluminescence, Flowinjection analysis, Sulfide ion determination, Electrogenerated hypobromite, Luminol

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