Sensitive electrochemical detection of arsenic (III) using gold nanoparticle modified carbon nanotubes via anodic stripping voltammetry

Xiao, L, Wildgoose, Gregory and Compton, R (2008) Sensitive electrochemical detection of arsenic (III) using gold nanoparticle modified carbon nanotubes via anodic stripping voltammetry. Analytica Chimica Acta, 620 (1-2). pp. 44-49. ISSN 1873-4324

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Abstract

Gold nanoparticles were deposited electrolessly on multiwalled carbon nanotubes (CNTs) via in situ reduction of HAuCl4 by NaBH4. The resulting gold covered nanotubes were immobilised onto the surface of a glassy carbon electrode via evaporation of a suspension in chloroform. Anodic stripping voltammetry was performed with the modified electrode in As(III) solutions. A limit of detection (LOD based on 3s) of 0.1 µg L-1 was obtained but more importantly a sensitivity of 1985 µA µM-1 was obtained with square wave voltammetry (SWV) in an optimised system with a deposition time of 120 s. These values, particularly the high sensitivity compare favourably with previously reported methods in the area of electrochemical arsenic detection.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Related URLs:
Depositing User: Rachel Smith
Date Deposited: 29 Mar 2011 15:15
Last Modified: 21 Apr 2020 17:53
URI: https://ueaeprints.uea.ac.uk/id/eprint/27503
DOI: 10.1016/j.aca.2008.05.015

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