Analisis Residu Pestisida Piretroid (Lamda Sihalotrin) pada Pakcoy (Brassica rapa subsp. chinensis) dengan Metode Kromatografi Gas

Abstract

Analysis of pyrethroid pesticide residues (lamda sihalotrin) on pakcoy (Brasssica rapa subsp.chinensis) by Gas chromatography method has been carried out. The purpose of this study was to determine the residual levels of pyrethroid pesticides in pakcoy (Brasssica rapa subsp. chinensis). Analysis of residual levels was determined using gas chromatography with the extraction method. With the experimental sequence, the sample was cut into pieces and dissolved with acetone, dichloromethane and petroleum ether, smoothed with ultraturax and left to stand until the filtrate and residue separated. The filtrate will be dried using a rotary evaporator and the result will be dissolved in isooctane and toluene in a ratio (90:10) and put into a test tube. Then determine the yield of the extract injected 1-2 μL in a gas chromatograph equipped with a specific detector for compounds containing elemental phosphorus (FPD) and (AFID). From the results of the analysis carried out, it was obtained that the pesticide residue levels in pakcoy from Berastagi District detected one active ingredient, namely lambda sialothrin as much as 0.164 mg/kg, while pakcoy from Raya District and Gundaling District did not have an active ingredient in the form of lambda sialothrin (not detected)