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- W2270181211 abstract "BACKGROUND: This study was performed to investigate pre-harvest residue limit (PHRL) in Chwinamul, to estimate biological half-life for residue of each pesticide. Chwinamul was sprayed with pesticides of standard and double application rate. Chlorfenapyr and fenarimol were sprayed once on Chwinamul at 10 days before harvest, and it was sampled 7 times and analysed the residual change of two pesticides. METHODS AND RESULTS: Chwinamul sample was extracted with acetonitrile and partitioned with dichloromethane, and pesticide residues were determined with GCECD. Method quantitation limit (MQL) of chlorfenapyr was 0.10mg/kg and that of fenarimol was 0.02mg/kg. Recoveries of chlorfenapyr at two fortification levels of 1.0 and 5.0mg/kg were 94.2±1.70 and 99.0±1.61%, respectively. Recoveries of fenarimol at two fortification levels of 0.2 and 1.0mg/kg were 92.1±2.14 and 83.1±1.98%, respectively. CONCLUSION(s): The biological half-lives of chlorfenapyr were about 3.5 days at standard application rate, and 3.4 days at double application rate. The biological half-lives of fenarimol were about 6.0 days at standard application rate, and 5.9 days at double application rate. The PHRLs of chlorfenapyr were recommended as 13.02 and 6.25mg/kg for 10 and 5 days before harvest, respectively. And the PHRLs of fenarimol were recommended as 2.80 and 1.67mg/kg for 10 and 5 days before harvest, respectively." @default.
- W2270181211 created "2016-06-24" @default.
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- W2270181211 date "2011-01-01" @default.
- W2270181211 modified "2023-09-27" @default.
- W2270181211 title "연구보문 : 환경환경 ; 취나물의 재배기간 중 살충제 Chlrofenapyr와 살균제 Fenarimol의 생산단계 농약잔류허용기준의 설정" @default.
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