Acta Chimica Sinica ›› 2003, Vol. 61 ›› Issue (5): 790-794. Previous Articles     Next Articles

Original Articles

基于巯基自组装单层膜的植物生长激素吲哚乙酸电化学免疫传感器的研究

李春香;李劲;萧浪涛;沈国励;俞汝勤   

  1. 湖南大学化学化工学院;湖南农业大学
  • 发布日期:2003-05-15

Amperometric Immunosensor Based on Mercapto Carboxylic Acid Self- assembled Monolayer for Phytohormone Indoleacetic Acid Assay

Li Chunxiang;Li Jin;Xiao Langtao;Shen Guoli;Yu Ruqin   

  1. State Key Laboratory of Chemo/Biosensing and Chemometrics, Chemistry and Chemical Engineering College, Hunan University;Key Laboratory of Phytohormones, Hunan Agricultural University
  • Published:2003-05-15

A competitive binding assay used to detennine hapten IAA with the aid of HRP-IAA conjugate has been developed. It is based on the ordered, stable mercapto self-assembled monolayer formed on gold surface, which immobilized IgG with covalent bond. The features of the substrate reaction under different conditions were investigated by cyclic voltammetry and the assay conditions were optimized. Under applied potential of - 200 mV, the response current is linear with lg [IAA], over a concentration range of 5.68 X 10-7 ~ 2.83 X 10-5 mol/L with a correlation coefficient of 0.9915. The sensor was applied for the determination of IAA sample with satisfactory results.

Key words: INDOLEACETIC ACID, CYCLOVOLTAMGRAPH, PLANT GROWTH REGULATORS, SENSORS, ELECTROCHEMISTRY

CLC Number: