Fast and direct determination of mancozeb through batch injection analysis with amperometric detection on boron-doped diamond electrodes

• Published in: Journal of electroanalytical chemistry (Lausanne, Switzerland) Vol. 733; pp. 85 - 90
• Main Authors: Silva, Renata A.G., Silva, Luiz A.J., Munoz, Rodrigo A.A., Richter, Eduardo M., Oliveira, Aline C.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-11-2014
• Subjects: Batch injection analysis; Boron-doped diamond electrodes; Insecticides; Mancozeb; Multiple-pulse amperometry; Boron-doped diamond electrodes; Insecticides; Multiple-pulse amperometry; Mancozeb; Batch injection analysis
• ISSN: 1572-6657; 1873-2569
• DOI: 10.1016/j.jelechem.2014.09.025

[Display omitted]
•A simple, fast and sensitive method for the determination of mancozeb is proposed.•The limit of detection was 5.14×10−7molL−1.•The determination of mancozeb exhibited relative error values lower than 2%.
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 0.3V, cleaning potential of 0.0V, dispensing rate of 160μLs−1 and injection volume of 100μL. A linear analytical curve was observed in the 40–650μmolL−1 range, with a detection limit of 5.14×10−7molL−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.