高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (7): 700.

• 研究论文 • 上一篇    下一篇

乳酸脱氢酶的流动注射分析-电化学检测体系的研究

邹公伟, 史坚, 陈佩红   

  1. 南京大学化学系
  • 收稿日期:1987-12-10 出版日期:1989-07-24 发布日期:1989-07-24
  • 通讯作者: 邹公伟
  • 基金资助:

    国家自然科学基金

Studies on Flow Injection Analysis-Electrochemical Detection System for Analyzing L-Lactate Dehydrogenase

Zou Gongwei, Shi Jian, Chen Peihong   

  1. Department of Chemistry, Nanjing University, Nanjing
  • Received:1987-12-10 Online:1989-07-24 Published:1989-07-24

摘要: 本文研究了L乳酸盐+NAD(这里有图片19890706-700-1.gif)丙酮酸+NADH+H+的酶反应动力学曲线及NADH的电化学性质与流动伏安检测法,建立了乳酸脱氢酶(LDH)的单泵单液路流动注射分析-电化学检测体系。可测定LDH的活性和浓度。

关键词: 乳酸脱氢酶, 还原辅酶Ⅰ, 流动注射分析, 电化学检测

Abstract: The new system for analyzing lactate dehydrogenase(LDH) by means of flow injection analysis-electrochemical detection has been established.The system was a single flow-way with a single pump.The PTFEreaction tube was 15 cm long(0.5 mmi.d.).The LDHcatalyzes the reaction between lactate and nicotinamideadenine dinucleotide(NAD).The nicotinamide adenine dinucleotide redused(NADH), which is product of above reaction, was determined by flow-cell amperometric detection.According to the kinetic curve obtained by spectrophotometry, the activity of LDHwas determined.The carrier was composed of 0.02 mol/L Na2HPO4, 0.4 mol/L NaNO3 and 0.06 mol/Llactic acid, the pHof the mixture was 9.4.The flow rate was 200 μL/min.The sample solution contained 1.015× 10-3 mol/L NAD, the sample volume injected was 10 μL.The working electrode was made of carbon paste and the potential was +0.80 V(vs SCE).

Key words: Laclate dehydrogenase, nicotinamide adenine dinucleotide-reduced, Flow injection analysis, Electrochemical detection

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