高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (12): 1815.

• 论文 • 上一篇    下一篇

N-四氢苯并噻唑亚胺Schiff碱的化学发光测定

张四纯, 李华, 高鸿   

  1. 西北大学分析科学研究所, 西安 710069
  • 收稿日期:1999-10-19 出版日期:2000-12-24 发布日期:2000-12-24
  • 通讯作者: 李 华(1962年出生),男,博士,教授,主要从事化学计量及过程分析化学研究.
  • 基金资助:

    国家自然科学基金(批准号:20075021);教育部高等学校骨干教师资助计划和陕西省教委重点科研计划(批准号:99JK006)资助

Chemiluminescence Determination of N-Tetrahydrobenzothiazolyl Imine Schiff Base

ZHANG Si-Chun, LI Hua, GAO Hong   

  1. Institute of Analytical Science, Northwest University, Xi an 710069, China
  • Received:1999-10-19 Online:2000-12-24 Published:2000-12-24

摘要: 新合成的噻唑类Schiff碱N-(2-四氢苯并噻唑)-2-羟基苯甲亚胺及类似化合物与Ce4+反应可产生微弱的化学发光,使用增敏剂奎宁可使发光显著增强.研究其发光反应动力学曲线、荧光光谱、化学发光光谱以及Schiff碱与Ce4+混合前后紫外可见吸收光谱的变化,确定了发生反应的官能团,讨论了发光反应的机理.考察了奎宁存在下Schiff碱与Ce4+化学发光反应条件及共存物质对发光强度的影响,建立了流动注射化学发光测定Schiff碱的方法.该法线性范围为2.0×10-7~1.0×10-4mol/L,检出限为8.0×10-8mol/L,对2.0×10-6mol/L噻唑类Schiff碱7次平行测定的相对标准偏差为2.4%.除Mn2+,Fe3+,Fe2+,Bi3+,Ti+外,大部分金属离子及500倍药物辅料淀粉不干扰噻唑类Schiff碱测定.与已有方法相比,具有灵敏、快速、简单、全自动等特点,成功地用于合成样品的分析。

关键词: 化学发光, 四价铈, 奎宁, N-四氢苯并噻唑亚胺Schiff碱, 流动注射分析

Abstract: Five newly synthesized Ntetrahydrobenzothiazolyl imines show weak chemiluminescence(CL) when oxidized by Ce(Ⅳ) in sulfuric acid, which is significantly enhanced when quinine is present as sensitizer.The possible mechanism is proposed based on CLspectrum, fluorescent spectrum and absorbent spectrum of Schiff base.The relationship between the CLintensity and the concentration of Schiff base is linear in the range of2.0×10-7-8.0×10-5mol/L, and the detection limit is8.0×10-8mol/L.The relative standard deviation(RSD) for7independent determinations of2.0×10-6mol/L Schiff base is 2.4%. Common excipient starch was used in pharmaceutical preparation and most of metal ions do not interfere with the determination of Schiff base, except Mn(Ⅱ), Fe(Ⅲ), Fe(Ⅱ), Bi(Ⅲ), Ti(Ⅰ).The method has been successfully used in analysis of synthesized samples

Key words: Chemiluninescence, Cerium(Ⅳ), Quinine, N-Tetrahydrobenzothiazolyl imine, Folw injection analysis

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