Abstract
The optimum conditions for the half-life time and residual analysis of the iminoactadine triacetate fungicide on soils were investigated by using the gas chromatography. Iminoctadine triacetate(IOTA) was extracted from soils with 2.0 M-NaOH/methanol and chloroform. The extracted IOTA was derivatized to pyrimidine hexafluroacetylacetone by the acetylation and analyzed with GC/ECD after elimination of moisture and impurities on the Sep-Pak column. From the standard addition experiments with 0.1 and 1.0 ppm, the average recoveries were ranged from 83.8 to 93.2 % and the detection limit was 0.005 ppm. The half-life time of iminoctadine triacetate in the silty clay was 30 days in the laboratory and 19.5 days in the field test whereas it was 27 days and 17.5 days for each in case of silty loam.
기체크로마토그래피로 살균제 iminoctadine triacetate의 잔류분석을 위한 최적 측정 조건을 구하고, 토양에서 반감기와 잔류농도를 조사하였다. 토양시료 중의 iminoctadine triacetate를 2.0 M NaOH/methanol과 chloroform으로 추출하고, hexafluoropentanedione과 반응시켜 pyrimidine 유도체를 얻었다. Pyrimidine 유도체를 trifluoroacetic anhydride로 아세틸화시키고, Sep-Pak 컬럼에서 수분과 불순물을 제거한 후 전자포획형 검출기가 장착된 기체크로마토그래피(GC/ECD)로 분석하였다. 0.1 ppm과 1.0 ppm 표준물을 첨가하였을 때, 83.8~93.2% 의 회수율을 얻었며, 검출한계는 0.005 ppm이었다. Iminoctadine triacetate 의 반감기가 미사질 양토 경우에는 실내에서 30일, 야외에서 19.5일이었으며, 미사질 식토의 경우에는 실내에서 27일, 야외에서 17.5일이었다.
