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Sulfite determination at in situ plated copper modified gold ultramicroelectrode arrays

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Ordeig, O, Banks, CE, del Campo, FJ, Munoz, FX, Davis, J and Compton, RG (2006) Sulfite determination at in situ plated copper modified gold ultramicroelectrode arrays. ELECTROANALYSIS, 18 (3). pp. 247-252. [Journal article]

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DOI: 10.1002/elan.200503395

Abstract

The electroanalytical detection of sulfite has been explored at an in situ formed copper ultramicroelectrode arrays. The protocol is based upon the in situ deposition of copper at a gold ultramicroelectrode array of cubic geometry which consists of 256 ultramicroelectrodes which are 5 microns in radius and are separated from their nearest neighbor by 100 microns. The immobilized copper array is electrocatalytic for the electrochemical reduction of sulfur dioxide which is formed after protonation of sulfite at low pH values (< pH 2). A sensitivity and detection limit of 0.35 nA mu M-1 and 6 mu M respectively is shown to be possible in pH 2.5 using linear sweep voltammetrv with a linear range observed from 20-500 mu M.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:14334
Deposited By:Professor James Davis
Deposited On:01 Jul 2010 09:27
Last Modified:18 Aug 2011 11:19

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