Macrocyclic Compounds Based Chemically Modified Electrodes for Voltammetric Determination of L-Tryptophan Using Electrocatalytic Oxidation

被引：20

作者：

Srivastava, Ashwini K. ^{[1
]}

Gaichore, Reena R. ^{[1
]}

机构：

[1] Univ Bombay, Fac Dept Chem, Bombay 400098, Maharashtra, India

来源：

ANALYTICAL LETTERS | 2010年 / 43卷 / 12期

关键词：

Chemically modified electrode; Differential pulse voltammetry; Eletrocatalysis; L-tryptophan; Macrocyclic compounds; PERFORMANCE LIQUID-CHROMATOGRAPHY; ADSORPTIVE STRIPPING VOLTAMMETRY; CARBON-PASTE ELECTRODE; AMINO-ACIDS; ELECTROCHEMICAL-BEHAVIOR; CAPILLARY-ELECTROPHORESIS; AMPEROMETRIC DETERMINATION; GAS-CHROMATOGRAPHY; MASS-SPECTROMETRY; DERIVATIVES;

D O I：

10.1080/00032711003687005

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrochemical behavior of L-tryptophan is studied at carbon paste electrode and electrodes modified with different macrocyclic compounds of which Dibenzo-18-crown-6 (DB18C6) showed better response for L-tryptophan at+0.95V vs. Ag/AgCl. Use of Ni2+ ions as electrocatalyst shows a further enhancement in peak current leading to a linear range of 1.96x10-6-1.01x10-3M and a detection limit of 9.79x10-8M by differential pulse voltammetry. Electrochemical impedance diagnosis reveals that L-tryptophan oxidation is kinetically facile on DB18C6 modified electrode. The modified electrode is used for L-tryptophan determination in real samples.

引用

页码：1933 / 1950

页数：18

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