%0 Journal Article
%T ESTANDARIZACI¨®N DE UN M¨¦TODO ANAL¨ªTICO PARA EXTRACCI¨®N Y CUANTIFICACI¨®N DE CIPERMETRINA EN PASTOS
%A Cardona
%A Yaneth
%A Chaparro
%A Amanda L
%A Calder¨®n
%A Lilia S
%A Pel¨¢ez
%A Manuel J
%A Garc¨ªa
%A Carlos H
%J Revista Colombiana de Qu¨ªmica
%D 2011
%I Universidad Nacional de Colombia
%X in this study, an analytical method has been developed to determine cypermethrin in grass matrices using direct immersion solid-phase microextraction (di-spme), coupled to gas chromatography with flame ionization detector (gc-fid). the optimized di-mefs experimental procedures to extract cypermethrin in grass matrix were: 5 g of the sample were heated with 10 ml of acetone 1% v/v in water during 10 min. 4 ml of this solution were used for extracting with a polydimethylsiloxane (pdms)-coated fiber at 60 ¡ãc and 500 rpm during 30 min. the analyte desorption was performed at 270 ¡ãc for 6 min. the proposed procedure showed linear behavior in the range tested (5-300 mg/l) with r2 of 0.999. the detection and quantification limits were 1.53 and 4.97 ng/ ml respectively with a standard deviation of 8.57% (n = 6). the method proposed in this paper allows determining cypermethrin in samples of grass to trace levels with a recovery of 99.08%.
%K pesticide
%K pyrethroids
%K cypermethrin
%K solid-phase microextraction (spme)
%K gas chromatography with fid (gc-fid).
%U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S0120-28042011000200006&lng=en&nrm=iso&tlng=en