Analysis of pesticide residues in rice using matrix solid-phase dispersion (MSPD)
This work reports a multi-residue extraction method based on matrix solid-phase dispersion (MSPD) and capillary gas chromatography - electron capture detection for quantification of two widely used organophosphorus insecticides (malathion and parathion-methyl) and an organochlorine pesticide (beta-endosulfan) in rice. A set of experiments was done with a spiked matrix with a standard mix, varying sample and solid phase amounts, solid phase and eluting solvent. Analyses of fortified rice samples were performed at different levels (0.5-10.0 mg kg-1). Mean recoveries from three replicates ranged from 75.5% to 116.0%, with coefficients of variation from 0.5% to 10.9%. The limit of detection was in the range of 20 to 105 pg for the pesticides. Commercial rice was analyzed for method application.
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Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Química
2004
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Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532004000500013 |
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