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고추와 고춧잎 중 가스 크로마토그래피를 이용한 alachlor의 잔류량 분석
무스픽 ( Md. Musfiqurrahman ),김성우 ( Sung Woo Kim ),박종혁 ( Jong Hyouk Park ),심재한 ( Jae Han Shim ) 한국환경농학회 2013 한국환경농학회 학술대회집 Vol.2013 No.-
Alachlor residues were determined in pepper and pepper leaf, after 49 days of manufacturer- recommended singleanddouble-dose application to the soil and plant. The samples were extracted with acetonitrile, partitioned with n-hexane, andpurified through solid-phase extraction, and finally detected with a gas chromatography-microelectron capture detector.The linearity of the analytical response across the studied range of concentrations (0.05-4.0 mg/mL) was excellent, obtainingcoefficients of determination (r2) of 0.999. Recovery studies were carried out on spiked pepper and pepper leaf samples, attwo concentrations levels (0.2 and 1.0 mg/kg), with three replicates performed at each level. Mean recoveries of 73.1-109.0%with relative standard deviations of 1.3-2.3% were obtained. The method was successfully applied to field samples, andalachlor residuewas found in pepper (0.02 mg/kg) and pepper leaf (0.03 mg/kg), at levels lower than themaximum residue limits (0.2 mg/kg) set by the Korea Food and Drug Administration. The field-detected residues were further confirmed with gaschromatography-mass spectrometry with the help of pepper leaf matrix protection.