Removal Effects of Organic-Phosphorus Pesticide Residue in lettuce by washing methods

세척방법에 따른 상추중 유기인 잔류농약의 제거효과

It is investigated to determine the removal efficiency of organic - phosphorus insecticide residues in lettuce by washing processes, the 5 washing solution (stagnant tap water, flowing tap water, alkaline solution, acidic solution) were used with the washing time(10, 30, 50sec) and frequencies(1, 2, 3 washing, 2 rinsing). The removal efficiency of residual pesticides by 5 washing methods was increased on the more washing time and frequency, and also was the highest on the 3 times washing for each 50 sec. The removal rate with stagnant tap water was 33.7% of Diazinon, 45.7% of Dimethoate and 24.6% of Fenitrothion, but 29.4% of Diazinon, 37.7% of Dimethoate and 24.5% of Fenitrothion with flowing tap water. Therefore, the former was significantly higher effective than the latter one. The removal rate of residual pesticides with alkaline solution showed 32.1% of Diazinon, 49.5% of Dimethoate and 29.9% of Fenitrothion, and 30.4% of Diazinon, 36.4% of Dimethoate and 21.0% of Fenitrothion with acidic solution. The washing efficiency of neutral detergent showed the most effective result than others with 47.1% of Diazinon, 58.0% of Dimethoate and 39.5% of Fenitrothion. Consequently, it's appeared that the neural detergent washing was the most effective method on the 3 times washing for each 50 sec.

유기 인계 살충제 농약 (Diazinon, Dimethoate, Fenitrothion)이 부착된 상추를 대상으로 정체된 물, 흐르는 물, 중성세제, 알카리용액 및 산성용액 등으로 세척시간(10, 30, 50초)과 세척횟수(1, 2, 3회)별로 잔류농약의 제거율을 조사한 결과는 다음과 같다. 다섯가지 세척방법에 의한 농약의 제거효과는 세척시간과 횟수가 늘어날수록 증가되었으며, 50초간 세척이 가장 높은 제거율을 보였다, 정체된 물을 세척제로 사용하여 50초간 3회 세척시 잔류농약의 제거율은 Diazinon 38.4%, Dimethoate 45.7%, Fenitrothion 24.6%이었으나, 흐르는 물에서는 Diazinon 29.4%, Dimethoate 37.7%, Fenitrothion 24.5%로 정체된 물에서 효과가 높게 나타났다. 알카리용액을 세척제로 사용했을때의 잔류농약 제거율은 Diazinon 32.1%, Dimethoate 49.5%, Fenitrothion 29.9%, 산성용액에서는 Diazinon 30.4%, Dimethoate 36.4%, Fenitrothion 21.0% 이었으며, 중성세제의 경우는 Diazinon 47.1%, Dimethoate 58.0%, Fenitrothion 39.5%로 다섯가지 세척제 중에서 가장 우수한 것으로 나타났다. 본 연구결과만으로 볼 때 중성세제를 세척제로 하여 50초간 3회 세척하는 것이 가장 효과적인 세척방법으로 조사되었다.