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论文类型：期刊论文

发表时间：2011-07-05

发表刊物：SENSORS AND ACTUATORS B-CHEMICAL

收录刊物：SCIE、EI

卷号：155

期号：1

页面范围：114-119

ISSN号：0925-4005

关键字：Chemical oxygen demand; Ti/Sb-SnO2/PbO2 electrode; Amperometric detection

摘要：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.