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Liquid Chromatography with Amperometric Detection Using Functionalized Multi-wall Carbon Nanotube Modified Electrode for the Determination of Monoamine Neurotransmitters and Their Metabolites by Wen Zhang; Yunfeng Xie; Shiyun Ai; Fangli Wan; Jian Wang; Litong Jin; Jiye Jin is a Chemistry article available to read on EtoBox.

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The fabrication and application of a novel electrochemical detection (ED) method with the functionalized multi-wall carbon nanotubes (MWNTs) chemically modified electrode (CME) for liquid chromatography (LC) were described. The electrochemical behaviors of dopamine (DA) and other monoamine neurotransmitters at the CME were investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results indicated that the CME exhibited efficient electrocatalytic effects on the current responses of monoamine neurotransmitters and their metabolites with high sensitivity, high stability and long-life activity. In LC-ED, DA, norepinephrine (NE), 3-methoxy-4-hydroxyphenylglycol (MHPG), 3,4-dihydroxyphenylacetic acid (DOPAC), 5-hydroxytryptamine (5-HT), 5-hydroxyindoleacetic acid (5-HIAA) and homovanillic acid (HVA) had good and stable current responses at the CME. The linear ranges of seven analytes were over four orders of magnitude and the detection limits were 2.5 x 10(-10) mol/l for DA, 2.5 x 10(-10) mol/l for NE, 5.0 x 10(-10) mol/l for MHPG, 3.0 x 10(-10) mol/l for DOPAC, 3.5 x 10(-10) mol/l for 5-HT, 6.0 x 10(-10) mol/l for 5-HIAA, 1.25 x 10(-9) mol/l for HVA. The app

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Author

Wen Zhang; Yunfeng Xie; Shiyun Ai; Fangli Wan; Jian Wang; Litong Jin; Jiye Jin

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-376X)

Published

2003

Language

EN

Field

Chemistry (Physical Sciences)