DETERMINATION OF EPINEPHRINE AT DIFFERENT TYPES OF CARBON PASTE ELECTRODES

被引：14

作者：

Jemelkova, Zuzana ^{[1
]}

Barek, Jiri ^{[1
]}

Zima, Jiri ^{[1
]}

机构：

[1] Charles Univ Prague, Dept Analyt Chem, Fac Sci, UNESCO Lab Environm Electrochem, Prague 12843 2, Czech Republic

来源：

ANALYTICAL LETTERS | 2010年 / 43卷 / 7-8期

关键词：

Carbon paste electrode; Carbon nanotubes; Crystal graphite; Differential pulse voltammetry; Epinephrine; Glassy carbon microparticles; BIOLOGICALLY-ACTIVE AMINES; ELECTROCHEMICAL-BEHAVIOR; CAPILLARY-ELECTROPHORESIS; ELECTROCATALYTIC PROPERTIES; VOLTAMMETRIC DETERMINATION; ASCORBIC-ACID; CATECHOLAMINES; NANOTUBES; NOREPINEPHRINE; SEPARATION;

D O I：

10.1080/00032710903518773

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The voltammetric behavior of epinephrine was investigated by differential pulse voltammetry (DPV) at a carbon paste electrodes (CPE) made of different carbon powders - CR-2, glassy carbon (GC) microparticles, and single-wall carbon nanotubes (SWNT). In Briton-Robinson (BR) buffer solution pH 6, the linear dependence was found for the determination of epinephrine by the given method in the concentration ranges of 1 . 10(-6) -1 . 10(-4) (CR-2), 1 . 10(-6) -1 . 10(-4) (GC microparticles) and 4 . 10(-6) - 1 . 10(-4) (SWNT) mol . dm(-3). Limits of detection were 8 . 10(-7), 8 . 10(-7), and 2 . 10(-6) mol . dm(-3), respectively. The best results were obtained employing CPE containing carbon paste with 50% (m/m) of SWNT, a linear dynamic range being 4 . 10(-7) - 1 . 10(-4) mol . dm(-3) and a limit of detection 2 . 10(-7) mol . dm(-3). The attempt to increase the sensitivity by adsorptive accumulation of epinephrine was not successful.

引用

页码：1367 / 1376

页数：10

共 54 条

[1] Electrochemical behavior and determination of epinephrine at a mercaptoacetic acid self-assembled gold electrode [J].