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Flow amperometric determination of carbofuran and fenobucarb
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Orientador(es)
Resumo(s)
A simple, rapid, and precise amperometric method for quantification of N-methylcarbamate
pesticides in water samples and phytopharmaceuticals is presented. Carbofuran and fenobucarb
are the target analytes. The method is developed in flow conditions providing the anodic
oxidation of phenolic-based compounds formed after alkaline hydrolysis. Optimization
of instrumental and chemical variables is presented. Under the optimal conditions, the
amperometric signal is linear for carbofuran and fenobucarb concentrations over the range of
1.0*10-7 to 1.0*10-5 molL-1, with a detection limit of about 2 ngmL-1. The amperometric
method is successfully applied to the analysis of spiked environmental waters and commercial
formulations. The proposed method allows 90 samples to be analysed per hour, using 500 mL
of sample, and producing wastewaters of low toxicity. The proposed method permits
determinations at the mgL 1 level and offers advantages of simplicity, accuracy, precision, and
applicability to coloured and turbid samples, and automation feasibility.
Descrição
Palavras-chave
Amperometry Carbofuran Fenobucarb Pesticides Flow-injection analysis
Contexto Educativo
Citação
Editora
Taylor & Francis