Fabrication of a highly sensitive amperometric sensor using 1,4-phenylene-N,N′-bis (O,O-diphenylphoramidate)/CdS quantum dots/multi-walled carbon nanotubes for nanomolar detection of captopril

被引：18

作者：

Paimard, Giti ^{[1
]}

Gholivand, Mohammad Bagher ^{[1
]}

Shamsipur, Mojtaba ^{[1
]}

Gholivand, Khodayar ^{[2
]}

Mohammadi-Behzad, Leila ^{[1
]}

Gholami, Akram ^{[2
]}

Barati, Ali ^{[3
]}

机构：

[1] Razi Univ, Dept Analyt Chem, Fac Chem, Kermanshah, Iran

[2] Tarbiat Modares Univ, Dept Chem, Tehran, Iran

[3] Inst Adv Studies Basic Sci, Fac Chem, Zanjan, Iran

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2015年 / 738卷

关键词：

Captopril; CdS quantum dots; Multi-walled carbon nanotubes; Amperometry; ANGIOTENSIN-CONVERTING ENZYME; LIQUID-CHROMATOGRAPHY METHOD; SOLID-PHASE EXTRACTION; CRYSTAL-STRUCTURES; ELECTROCATALYTIC DETERMINATION; ORGANOTIN(IV) COMPLEX; VOLTAMMETRIC SENSOR; MODIFIED ELECTRODE; DOSAGE FORMS; DOTS;

D O I：

10.1016/j.jelechem.2014.12.001

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel modified glassy carbon electrode (GCE) based on a new synthesized compound 1,4-phenylene-N,N'-bis (O,O-diphenylphoramidate) (PDPP), L-cysteine capped CdS quantum dots (CdS-QDs) and multi-walled carbon nanotubes (MWCNTs) was prepared. After studying the redox properties of the modified electrode by cyclic voltammetry, it was used as an electrochemical sensor for oxidation of captopril (CAP). Combination of CdS-QDs and MWCNTs with PDPP considerably improved the current response of the GCE towards electrocatalytic oxidation of CAP. Under hydrodynamic conditions (stirred solutions) at a fixed potential, oxidation current was proportional to the CAP concentration and calibration plot was linear over the concentration range of 0.05-90 mu M and detection limit was found to be 15 nM. The results of applying the proposed amperometric sensor for the determination of CAP in spiked urine and tablet were also encouraging. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：176 / 183

页数：8

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