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Establishment of Pre-Harvest Residue Limits of Clothianidin and Thiacloprid in Ginseng

인삼 중 Clothianidin 및 Thiacloprid의 생산단계 농약잔류허용기준 설정

  • Na, Eun-Shik (Korea Ginseng Corp. Safty Evaluation Department) ;
  • Lee, Yong-Jae (Korea Ginseng Corp. Safty Evaluation Department) ;
  • Kim, Kyoung-Ju (Korea Ginseng Corp. Safty Evaluation Department) ;
  • Kim, Seong-Soo (Korea Ginseng Corp. Safty Evaluation Department) ;
  • Lee, Kyu-Seung (Department of Bio Environmental Chemistry, Chungnam National University)
  • 나은식 ((주)한국인삼공사 안전성연구소) ;
  • 이용재 ((주)한국인삼공사 안전성연구소) ;
  • 김경주 ((주)한국인삼공사 안전성연구소) ;
  • 김성수 ((주)한국인삼공사 안전성연구소) ;
  • 이규승 (충남대학교 농업생명과학대학 생물환경화학과)
  • Received : 2013.06.24
  • Accepted : 2013.08.12
  • Published : 2013.09.30

Abstract

The residue patterns of clothianidin and thiacloprid, insecticides registered in the ginseng, were investigated to predict pre-harvest residues limits (PHRL). Pesticides were treated under Korea GAP (Good Agricultural Practices) with the recommended dose (single dose) and twice of recommended dose (double dose). Samples were collected 11 times over 42 days (each 0, 2, 5, 8, 12, 16, 20, 24, 28, 33, 42 days after treatment). Residues of clothinidin and thiacloprid were analyzed by UPLC/TQD. Biological half-life of clothinidin in single dose and double dose were 14.6 days and 10.2 days and that of thiacloprid were also 9.7 days and 11.2 days, respectively. The PHRL of ginseng on 10 days before harvest was 0.3 mg/kg in clothianidin and 0.18 mg/kg in thiacloprid.

본 연구는 인삼 재배 중 사용되는 clothianidin과 thiacloprid의 생산단계 잔류허용기준 설정을 통하여 안전한 인삼 생산에 기여하고자 수행되었다. 먼저, clothianidin과 thiacloprid을 살포하고, 살포 후 0, 2, 5, 8, 12, 16, 20, 24, 28, 33, 42일의 총 11회에 걸쳐 인삼 시료를 채취하여 각각의 농약을 분석하고 생물학적 반감기를 산출한 다음 생산단계 잔류허용기준(PHRL)을 설정하였다. 인삼 중 clothianidin과 thiacloprid은 acetonitrile을 이용하여 추출하여 UPLC/TQD로 분석하였다. 두 농약에서 검출한계는 모두 0.01 mg/kg이었다. Clothianidin의 회수율은 0.2 mg/kg 과 1.0 mg/kg 두 수준에서 각각 $108.6{\pm}5.4%$, $100.4{\pm}1.1%$이었으며, thiacloprid의 회수율은 0.5 mg/kg과 2.5 mg/kg 수준에서 각각 $93.4{\pm}4.9%$, $91.1{\pm}6.2%$이었다. 인삼에서 clothianidin의 생물학적 반감기는 기준량 살포 시 14.6일, 배량 살포시 10.2일 이었고, thiacloprid의 생물학적 반감기는 기준량 살포 시 9.7일, 배량 살포시 11.2일이었다. 잔류회귀 감소식을 이용한 생산단계 잔류허용기준은 clothianidin과 thiacloprid은 각각 수확 10일 전 0.30 mg/kg과 0.18 mg/kg으로 제안하였다.

Keywords

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