First report for voltammetric determination of methyldopa in the presence of folic acid and glycine

被引：26

作者：

Molaakbari, Elahe ^{[1
,2
]}

Mostafavi, Ali ^{[1
]}

Beitollahi, Hadi ^{[3
]}

机构：

[1] Shahid Bahonar Univ Kerman, Dept Chem, Kerman, Iran

[2] Shahid Bahonar Univ Kerman, Young Researchers Soc, Kerman, Iran

[3] Grad Univ Adv Technol, Inst Sci & High Technol & Environm Sci, Dept Environm, Kerman, Iran

来源：

MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS | 2014年 / 36卷

关键词：

Methyldopa; Folic acid; Glycine; TiO2; nanoparticles; Modified electrodes; NANOTUBE PASTE ELECTRODE; ELECTROCHEMICAL SENSOR; CARBON NANOTUBES; ASCORBIC-ACID; URIC-ACID; 2,7-BIS(FERROCENYL ETHYL)FLUOREN-9-ONE; ELECTROCATALYTIC DETERMINATION; SELECTIVE DETERMINATION; NANOPARTICLES; OXIDATION;

D O I：

10.1016/j.msec.2013.12.013

中图分类号：

TB3 [工程材料学]; R318.08 [生物材料学];

学科分类号：

0805 ; 080501 ; 080502 ;

摘要：

In this study, a carbon paste electrode modified with TiO2 nanoparticles and ferrocene monocarboxylic acid (FM) was used to prepare a novel electrochemical sensor. The objective of this novel electrode modification was to seek new electrochemical performances for the detection of methyldopa in the presence of folic acid and glycine. The peak potentials recorded in a phosphate buffer solution (PBS) of pH 7.0 were 325,750 and 880 mV vs. Ag/AgCl/KCl (3.0 M) for methyldopa, folic acid and glycine, respectively. Under the optimum pH of 7.0, the oxidation of methyldopa occurred at a potential about 160 mV less positive than that of the unmodified carbon paste electrode (CPE). The response of catalytic current with methyldopa concentration showed a linear relation in the range from 2.0 x 10(-7) to 1.0 x 10(-4) M with a detection limit of 8.0 (+/- 0.2) x 10(-8) M. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：168 / 172

页数：5

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