Document Detail


Investigation into the voltammetric behaviour and detection of selenium(IV) at metal electrodes in diverse electrolyte media.
MedLine Citation:
PMID:  21704767     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
The voltammetric behaviour of selenium(IV) was studied at platinum and gold electrodes in sulphuric acid, perchloric acid and potassium chloride media as a basis for its voltammetric detection. The best voltammetric behaviour was recorded at gold electrodes with perchloric acid as the supporting electrolyte. The concomitant presence of metals, such as copper or lead, and of model biomolecules, such as bovine serum albumin, in the solution resulted in a deterioration of the electrochemical response for selenium(IV). Quantitative detection of selenium(IV) by square wave anodic stripping voltammetry at both a millimetre-sized gold disc electrode and a microband electrode array revealed linear responses to selenium concentration in the ranges 5-15μM and 0.1-10μM, respectively, with 60s preconcentration. The sensitivities were 6.4μAμM(-1)cm(-2) and 100μAμM(-1)cm(-2) at the disc and the microband array, respectively. The detection limit at the microband electrode array was 25nM, illustrating the potentiality of such microelectrodes for the development of mercury-free analytical methods for the trace detection of selenium(IV).
Authors:
Valerio Beni; Gillian Collins; Damien W M Arrigan
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Publication Detail:
Type:  Journal Article     Date:  2011-05-24
Journal Detail:
Title:  Analytica chimica acta     Volume:  699     ISSN:  1873-4324     ISO Abbreviation:  Anal. Chim. Acta     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-06-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370534     Medline TA:  Anal Chim Acta     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  127-33     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier B.V. All rights reserved.
Affiliation:
Tyndall National Institute, University College, Cork, Ireland.
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