%0 Journal Article
%T Development and validation of methodology for the determination of residues of organophosphorus pesticides in tomatoes
%A Gobo
%A Anagilda B.
%A Kurz
%A M¨˘rcia H. S.
%A Pizzutti
%A Ionara R.
%A Adaime
%A Martha B.
%A Zanella
%A Renato
%J Journal of the Brazilian Chemical Society
%D 2004
%I Sociedade Brasileira de Qu¨Şmica, SBQ
%R 10.1590/S0103-50532004000600024
%X the organophosphorus pesticides are frequently applied in tomato cultivation in brazil. in the present work an analytical methodology for quantification of the organophosphorus pesticides: acephate, chlorpyrifos, malathion, methamidophos and parathion-methyl residues in tomatoes was developed and validated using gas chromatography with a nitrogen-phosphorus detector (gc-npd). the possibility of a matrix effect was studied. analytical curves prepared in an extract of the matrix were linear from 0.006 to 0.80 mg l-1. the precision studies supplied results with rsd <15%. the recoveries of the pesticides calculated from the curve prepared in the matrix extract were between 88 and 118%. with the proposed procedure quantification limits between 0.0132 and 0.135 mg kg-1 were obtained.
%K pesticide residues
%K organophosphorus
%K gc-npd
%K tomato.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532004000600024&lng=en&nrm=iso&tlng=en