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
收藏
页码：1933 / 1950
页数：18
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