Carbon paste electrode modified with a binuclear manganese complex as a sensitive voltammetric sensor for tryptophan

被引：0
作者：
Jinsheng Xu
Yali Yuan
Wei Li
Peihong Deng
Jian Deng
机构：
[1] Hengyang Normal University,Department of Chemistry and Material Science
[2] Nanhua University,College of Chemistry and Chemical Engineering
来源：
Microchimica Acta | 2011年 / 174卷
关键词：
Binuclear manganese(II) complex; Carbon paste electrode; Tryptophan;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We report on a carbon paste electrode that was modified with a binuclear manganese(II) complex by the drop-coating method. A study on the mechanism of the electro-oxidation of tryptophan (Trp) at this electrode indicated that it enables Trp to be determined with good sensitivity and selectivity. Second-order derivative linear sweep voltammetry at pH 4.1 revealed that a sensitive anodic peak appears at 812 mV (vs. SCE) whose current is proportional to the concentration of Trp in the concentration range from 0.1 to 1.0 μmol L−1 and 1.0 to 80 μmol L−1, with a detection limit (S/N = 3) of 0.08 μmol L−1 (60 s of accumulation). The method was applied to the determination of Trp in amino acid injection solutions with satisfactory results.
引用
收藏
页码：239 / 245
页数：6
相关论文
共 75 条
[1]  
Pi LG(2009)More rapid and sensitive method for simultaneous determination of tryptophan and kynurenic acid by HPLC Clin Biochem 42 420-undefined
[2]  
Tang AG(2008)Simultaneous measurement of tryptophan and related compounds by liquid chromatography/electrospray ionization tandem mass spectrometry J Chromatogr B 867 57-undefined
[3]  
Mo XM(1995)Determination of tryptophan and kynurenine in brain microdialysis samples by capillary electrophoresis with electrochemical detection J Chromatogr A 700 73-undefined
[4]  
Luo XB(2002)Derivatization trends in capillary electrophoresis: an update Electrophoresis 23 3922-undefined
[5]  
Ao X(2007)Study on electrochemical behavior of tryptophan at a glassy carbon electrode modified with multi-walled carbon nanotubes embedded cerium hexacyanoferrate Talanta 72 1302-undefined
[6]  
Yamadaa K(2007)Carbon paste electrode incorporating multi-walled carbon nanotube/cobalt salophen for sensitive voltammetric determination of tryptophan Sens Actuators B 123 942-undefined
[7]  
Miyazakib T(2006)Determination of tryptophan and histidine by adsorptive cathodic stripping voltammetry using H-point standard addition method Anal Chim Acta 580 236-undefined
[8]  
Shibatac T(2002)Electrochemical behavior of tryptophan and its derivatives at glassy carbon electrode modified with hemin Anal Chim Acta 452 245-undefined
[9]  
Haraa N(2004)Electrocatalysis of tryptophan at multi-walled carbon nanotube modified electrode Microchim Acta 144 243-undefined
[10]  
Tsuchiyaa M(2010)Electrochemical determination of L-Tryptophan, L-Tyrosine and L-Cysteine using electrospun carbon nanofibers modified electrode Talanta 80 2182-undefined
12345678