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Indexed by:期刊论文

Date of Publication:2011-07-05

Journal:SENSORS AND ACTUATORS B-CHEMICAL

Included Journals:SCIE、EI

Volume:155

Issue:1

Page Number:114-119

ISSN No.:0925-4005

Key Words:Chemical oxygen demand; Ti/Sb-SnO2/PbO2 electrode; Amperometric detection

Abstract:A novel Ti/Sb-SnO2/PbO2 composite electrode was fabricated for COD determination. The new electrode configuration improved the sensitivity of the amperometric method apparently. Effects of common experimental parameters, such as applied potential, pH and concentration of the electrolyte on its analytical performance were investigated. A linear range of 0.5-200 mg L-1 COD and a detection limit (a signal-to-noise ratio of 3) of 0.3 mg L-1 were achieved under optimized conditions. The experiments for detecting COD in model samples and real samples were carried out to evaluate the electrode's performance. The obtained results were in good agreement with those determined by the standard dichromate method. with a relative error less than 12%. (C) 2010 Elsevier B.V. All rights reserved.