Voltammetric Determination of Captopril on a Glassy Carbon Electrode Modified with Copper Metal-organic Framework

被引：16
|
作者：
Vasconcelos, Wellyton Silva [1 ]
da Silva, Gilvaldo Gentil [1 ]
Alves Junior, Severino [1 ]
dos Anjos, Janaina Versiani [1 ]
da Cunha Areias, Madalena Carneiro [1 ]
机构：
[1] Univ Fed Pernambuco, Dept Quim Fundamental, Ctr Ciencias Exatas & Nat, Ave Jornalista Anibal Fernandes,S-N Cidade Univ, BR-50740560 Recife, PE, Brazil
来源：
ELECTROANALYSIS | 2017年 / 29卷 / 11期
关键词：
Copper metal-organic framework; H Kust-1 or Cu-3(BTC)(2) or Cu-BTC; Captopril; Acrylamide and sodium acrylate copolymer; Differential pulse voltammetry; PERFORMANCE LIQUID-CHROMATOGRAPHY; COBALT PHTHALOCYANINE; SODIUM ACRYLATE; THIOLS; SENSOR; URINE; BLOOD; GEL;
D O I：
10.1002/elan.201700384
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We report in this work, a new method for the determination of captopril by differential pulse voltammetry using a glassy carbon electrode modified with a copper metal-organic framework (H-Kust-1 or Cu-3(BTC)(2) or Cu-BTC), immobilized on the surface by a copolymer of acrylamide and sodium acrylate. This compound is detected by the formation of a copper(II)-captopril complex that is observed in an oxidation potential at ca. +0.28 V vs. Ag/AgCl. A linear dynamic range is obtained for a captopril concentration of 0.5 mu M to 7.0 mu M and the voltammetric response is highly reproducible within 3.52% error. The sensitivity of 9.71 +/- 0.37 nA mu M-1 and the limit of detection of 0.20 +/- 0.01 mu M make this methodology highly applicable for practical applications. The determination of captopril in a commercial pharmaceutical sample showed a recovery of 93.3%.
引用
收藏
页码：2572 / 2578
页数：7
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