análise de praguicidas organofosforados em água por extração em fase sólida (spe) utilizando discos c18 e cromatografia em fase gasosa: avaliação da contaminação do reservatório de furnas (mg-brasil)
Abstract
Solid phase extraction (SPE) in C18 disks has been optimized and validated for extraction of 5 organophosphorus (OP) pesticides in water. Extraction has been followed by separation and detection by gas chromatography/flame photometry. Excellent linearity was obtained for all compounds (r greater than 0.99), with CVs between 1.0-6.9%, recoveries between 73-95% and quantification limits between 2.5-5.0 µg L-1. Samples from Furnas dam were analyzed monthly during one year and 10% showed OP pesticide residues.
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