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Establishment of Pre-Harvest Residue Limit (PHRL) of Emamectin benzoate during Cultivation of Amaranth

생산단계 비름 중 Emamectin benzoate의 잔류허용기준 설정

  • Kim, Kyung Jin (Division of Biological Environment, College of Agriculture and Life Sciences, Kangwon National University) ;
  • Kim, Da Som (Division of Biological Environment, College of Agriculture and Life Sciences, Kangwon National University) ;
  • Heo, Seong Jin (Environment Friendly Agricultural Products Safety Center) ;
  • Ham, Hun Ju (Environment Friendly Agricultural Products Safety Center) ;
  • Hur, Jang Hyun (Division of Biological Environment, College of Agriculture and Life Sciences, Kangwon National University)
  • 김경진 (강원대학교 농업생명과학대학 바이오자원환경학과) ;
  • 김다솜 (강원대학교 농업생명과학대학 바이오자원환경학과) ;
  • 허성진 (친환경농산물안전성센터) ;
  • 함헌주 (친환경농산물안전성센터) ;
  • 허장현 (강원대학교 농업생명과학대학 바이오자원환경학과)
  • Received : 2013.04.08
  • Accepted : 2013.06.03
  • Published : 2013.08.30

Abstract

This study was performed to investigate pre-harvest residue limit (PHRL) in amaranth, to estimate biological half-life of emamectin benzoate and identify the characteristics of the residue. Pesticides of standard and double appplication rate, were sprayed once on amaranth at 0, 1, 2, 3, 5, 7, 10, 14 days before harvest. Amaranth sample was extracted with acetonitrile and partitioned with dichloromethane, and pesticide residues were determined with LC/MS/MS. The limit of detection of emamectin benzoate was 0.01 mg/kg. Recoveries of emamectin benzoate ($B_{1a}$, $B_{1b}$) at two fortification levels of 0.1 and 0.5 mg/kg, $B_{1a}$ were $93.3{\pm}0.7%$ and $93.2{\pm}7.7%$, $B_{1b}$ were $106.6{\pm}1.9%$ and $80.5{\pm}6.6%$, respectively. The biological half-lives of emamectin benzoate were about 2.0 days at standard application rate and 1.7 days at double application rate, respectively. The PHRL of emamectin benzoate were recommended as 0.84 mg/kg for 10 days before harvest.

Acknowledgement

Supported by : 농촌진흥청

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