期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 733, 期 -, 页码 85-90出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2014.09.025
关键词
Boron-doped diamond electrodes; Multiple-pulse amperometry; Batch injection analysis; Mancozeb; Insecticides
资金
- CNPQ [472465/2012-0]
- FAPEMIG [PPM-00503-13]
This work describes the determination of mancozeb in insecticide samples using batch injection analysis (BIA) with pulsed amperometric detection (PAD) on boron-doped diamond (BDD) electrodes. The BIA amperometric parameters were evaluated and the best responses were achieved in phosphate solution at pH 9.0, using a detection potential of 0.3 V, cleaning potential of 0.0 V, dispensing rate of 160 mu L s(-1) and injection volume of 100 mu L. A linear analytical curve was observed in the 40-650 mu mol L-1 range, with a detection limit of 5.14 x 10(-7) mol L-1. The determination of mancozeb in the insecticide samples proved to be in agreement with the standard iodometric titration (CIPAC method), with a 95% confidence level and with a relative error lower than 2%. In this way, the BIA-PAD method presented a fast response, high sensitivity, good repeatability and good reproducibility. (C) 2014 Elsevier B.V. All rights reserved.
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