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Tungsten Sensor for Amperometric Detection of Organic Thiols and Proteins


Alexander, PW and Hidayat, A and Hibbert, DB, Tungsten Sensor for Amperometric Detection of Organic Thiols and Proteins, Electroanalysis, 7, (3) pp. 290-291. ISSN 1040-0397 (1995) [Refereed Article]

DOI: doi:10.1002/elan.1140070318


An amperometric sensor constructed with a metallic tungsten wire is reported for the indirect detection of organic thiols and proteins. Cysteine added to mercury(II) (40.0μM) buffered in 5.0 mM sodium acetate at pH 4.7 causes a decrease in the reduction current of mercury at −0.2 V (vs. SCE). Detection limits were found to be in the range 0.05"0.2 μg/mL for cysteine, thiourea and glutathione, but were poorer for albumin and DNA, showing this method is relatively selective for cysteine. The advantages of the tungsten electrode are its low cost, miniature size, and its inert oxide surface which does not amalgamate with mercury. Copyright © 1995 VCH Verlagsgesellschaft mbH

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Instrumental methods (excl. immunological and bioassay methods)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Alexander, PW (Professor Peter Alexander)
ID Code:3410
Year Published:1995
Web of Science® Times Cited:21
Deposited By:Applied Science
Deposited On:1995-08-01
Last Modified:2011-08-22

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