化学学报 ›› 2004, Vol. 62 ›› Issue (8): 794-798. 上一篇    下一篇

研究论文

化学发光新技术的研究——外参比校正法识别生物样品中的叠氮化钠

曹志娟, 刘彩云, 卢建忠   

  1. 复旦大学药学院, 上海, 200032
  • 投稿日期:2003-09-30 修回日期:2003-12-20 发布日期:2014-02-18
  • 通讯作者: 卢建忠,E-mail:jzlu@shmu.edu.cn E-mail:jzlu@shmu.edu.cn

Study of New Chemiluminescence Technique--Recognition of Sodium Azide by External Reference Method

CAO Zhi-Juan, LIU Cai-Yun, LU Jian-Zhong   

  1. School of Pharmacy, Fudan University, Shanghai 200032
  • Received:2003-09-30 Revised:2003-12-20 Published:2014-02-18

针对大多数化学发光反应选择性差的缺陷,建立了一种基于外参比校正的化学发光新技术,从而实现了化学发光法对待测物的选择性识别.区别于以前常用的单个化学发光反应,偶合两个相似的化学发光反应,进行样品中叠氮化钠的选择性识别.两个相似的化学发光反应所用的氧化剂和催化剂相同,但化学发光增强剂不同.实验结果证明:偶合下列两个反应:H2O2-CH3CN-四环素(工作反应)和H2O2-CH3CN-N-乙酰-5-甲氧基色胺(参比反应),我们能够从多种相似的自由基淬灭剂中选择性地识别出叠氮化钠.这是因为叠氮化钠仅淬灭"工作反应"的化学发光信号,而其它的自由基淬灭剂则同时淬灭"工作反应"和"参比反应"的化学发光信号.作为应用示例,已利用该技术选择性识别并定量分析了商品化胰岛素试剂盒中各种试剂、人血清白蛋白和羊抗人IgG抗体样品中的叠氮化钠.

关键词: 化学发光, 叠氮化钠, 识别, 偶合, 工作反应, 参比反应

A limitation to the widespread application of chemiluminescence (CL) technique often lies in the poor selectivity of the CL reaction. A novel concept was proposed to address this selectivity problem. Two CL reactions, not just one reaction as generally used before, were used for the recognition of sodium azide from other similar radical scavengers. These two reactions have the same oxidant and catalyst but different enhancer. By coupling two CL reactions, i.e. H2O2-acetonitrile-tetracycline (working reaction) and H2O2-acetonitrile-melatonin (reference reaction), sodium azide could be clearly identified and quantitatively determined in the presence of other similar compounds. It is because that sodium azide only quenches the CL signal of the working reaction, whereas other similar compounds quench the CL signal of both working reaction and reference reaction. As a preliminary application, this novel technique has been employed to determine sodium azide in the reagents of the commercial insulin kit.

Key words: chemiluminescence, sodium azide, recognition, coupling, working reaction, reference reaction