Reduction of Pesticide Residues in Field-Sprayed Leafy Vegetables by Washing and Boiling

엽채류의 세척 및 끓임에 의한 엽면살포 농약의 경감

  • Kwon, Hye-Young (Hazardous Substances Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Lee, Hee-Dong (Planning and coordination division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Jin-Bae (Hazardous Substances Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Jin, Yong-Duk (Hazardous Substances Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Moon, Byeong-Chul (Hazardous Substances Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Park, Byung-June (Hazardous Substances Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Son, Kyung-Ae (Hazardous Substances Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kwon, Oh-Kyung (Hazardous Substances Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Hong, Moo-Ki (Hazardous Substances Division, National Academy of Agricultural Science, Rural Development Administration)
  • 권혜영 (농촌진흥청 국립농업과학원 유해물질과) ;
  • 이희동 (농촌진흥청 국립농업과학원 기획조정과) ;
  • 김진배 (농촌진흥청 국립농업과학원 유해물질과) ;
  • 진용덕 (농촌진흥청 국립농업과학원 유해물질과) ;
  • 문병철 (농촌진흥청 국립농업과학원 유해물질과) ;
  • 박병준 (농촌진흥청 국립농업과학원 유해물질과) ;
  • 손경애 (농촌진흥청 국립농업과학원 유해물질과) ;
  • 권오경 (농촌진흥청 국립농업과학원 유해물질과) ;
  • 홍무기 (농촌진흥청 국립농업과학원 유해물질과)
  • Published : 2009.06.30

Abstract

The reduction rate of pesticide residues on spinach(bifenthrin, metalaxyl, procymidone), chard(bifenthrin, imidacloprid) and mallow(bifenthrin, chlorpyrifos, imidacloprid) were tested on each step of washing and boiling(spinach: 1, 3, 5min., chard: 3, 6, 9min., mallow: 10, 20, 30min.). The reduction rates of bifenthrin and procymidone by washing were $58{\sim}64%$ and 82%, and these were not changed significantly after boiling. In case of imidacloprid, the rates showed 43% on chard and 12% on mallow by washing, and these were highly increased to 94% after boiling. And the reduction rate of metalaxyl and chloropyrifos were 69% and 11% by washing, and $96{\sim}98%$ and $77{\sim}79%$ by boiling. Specifically we monitored the pesticide residues on both boiled vegetable and its water because there are used to cook as soup in Korea. The total residual amounts of imidacloprid and chloropyrifos were effectively removed on both boiled mallow and its water ($12%{\rightarrow}34{\sim}40%$, $11%{\rightarrow}76{\sim}79%$), however, the other tested pesticides were not changed on pesticide residues when calculated with total amounts on boiled vegetable and its water. These explained the other pesticides were just moved vegetable to water by boiling.

작물을 데치거나 국을 끓여 먹는 과정에서의 잔류농약 경감을 조사하기 위해 비닐하우스에서 재배하면서 농약을 살포한 시금치 (bifenthrin, metalaxyl, procymidone), 근대(bifenthrin, imidacloprid), 아욱(bifenthrin, chlorpyrifos, imidacloprid)을 세척하고 물에 넣고 끓여(시금치: 1분, 3분, 5분, 근대: 3분, 6분, 9분, 아욱: 10분, 20분, 30분) 잔류농약 제거율을 조사하였다. Bifenthrin, procymidone은 세척에 의해 각각 $58{\sim}64%$, 82%제거되었고 끓임에 의해 제거율이 유효하게 변하지 않았다. Imidacloprid의 경우 근대에서 43%, 아욱에서 12%가 세척에 의해 제거되었으며 끓임에 의해 94%까지 크게 제거되었다. Metalaxyl, chlorpyrifos는 세척에 의해 각각 69%, 11%가 제거되었고 끓임에 의해 98%, 79%까지 유효하게 제거되었다. 한편 국을 끓여 먹을 때를 고려하여 끓이는 과정에서 사용된 물과 작물체를 합하여 제거율을 조사했을 때는 아욱의 imidacloprid와 chloropyrifos만이 끓임에 의해 효과적으로 제거되었고($12%{\rightarrow}34{\sim}40%$, $11%{\rightarrow}76{\sim}78%$) 다른 농약들은 세척과 차이가 없었다. 이러한 농약들은 작물체를 물에서 끓이는 과정에서 물로 이동되었으나 끓임에 의해 제거되지 않고 물속에 남아 있는 것으로 판단되었다.

Keywords

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