Impedimetric and Stripping Voltammetric Detection of Sub-Nanomolar Amounts of Mercury at a Gold Nanoparticle Modified Glassy Carbon Electrode

被引：10

作者：

Behzad, Mahsa ^{[1
]}

Asgari, Mehdi ^{[1
]}

Shamsipur, Mojtaba ^{[2
]}

Maragheh, Mohammad Ghannadi ^{[1
]}

机构：

[1] NSTRI, NFCRS, Tehran, Iran

[2] Razi Univ, Dept Chem, Kermanshah, Iran

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2013年 / 160卷 / 03期

关键词：

ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; OLIGONUCLEOTIDE-DNA INTERACTIONS; COMPOSITE FILM; WATER SAMPLES; IMMUNOSENSORS; EXTRACTION; BIOSENSORS; LEAD(II); CATALASE; BEHAVIOR;

D O I：

10.1149/2.011304jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A glassy carbon electrode (GCE) modified with gold nanoparticles (GNPs) was used for the determination of sub-nanmolar amounts of mercury in water samples using differential pulse stripping voltammetry (DPSV) and electrochemical impedance spectroscopy (EIS). The GNPs/ GCE electrode revealed a significant improvement for mercury detection compared with the unmodified GCE. Under the optimized experimental conditions, the modified GNPs/GCE revealed broad linear ranges of 1 to 500 nM (LOD = 0.1 nM) and 10-50 pM (LOD = 0.05 pM) for DPSV and EIS, respectively. The limits of detections obtained are much below the corresponding guideline value from the World Health Organization (WHO): The proposed DPSV method was successfully applied to the analysis of mercury content of tap water samples. (C) 2013 The Electrochemical Society. [DOI: 10.1149/2.011304jes] All rights reserved.

引用

页码：B31 / B36

页数：6

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