Acknowledgement
Supported by : 주식회사 경농
The solvent extraction and clean up processes for the gas chromatographic determination of muarimol pesticide residues in apples were investigated and examined the changes of residual concentration with the passage of time. The extracted pesticide with methanol were partitioned with dichloromethane after adding sodium chloride solution. The separated solutions were concentrated and transfered to the alumina column for clean up, and eluated with 1-chlorobutane : methanol solution. As a results their recovering for 0.200 and 1.00ppm muarimol spiked on apples have shown 79~95%. Residual amounts of nuarimol in apple was 0.0830ppm when the fungicide was treated eight times until 3 days before its harvest. It seems to be safely used when nuarimol is treated six times until 7 days before harvest of apple.
기체 크로마토그래피를 이용하여 과수 재배용 살균제인 nuarimol의 분석을 위한 최적 조건을 조사하고 사과 중에서의 잔류성을 규명하였다. 사과시료를 methanol로 추출, 여과한 후 4.00% NaCl과 dicholromethane액으로 분리농축하고, alumina 컬럼상에서 1-chlorobutane과 methanol 혼합액으로 정제하여 GLC/ECD로 분석하였다. 0.200와 1.00ppm 표준물 첨가 실험결과 평균 회수율이 79~95%였고, 사과 중 nuarimol의 잔류량은 수확 3일 전 8회 처리시 0.0830ppm이었다. 사과에 대한 안전 사용기간은 수확 7일전 6회 사용이 적당한 것으로 나타났다.
Supported by : 주식회사 경농