천궁 중 mandipropamid와 metalaxyl-M의 잔류특성 연구

This study was conducted to investigate residual characteristics and to evaluate safety of mandipropamid and metalaxyl-M in minor crop used as herbal medicine Cnidium officinale Makino. The pesticides were sprayed three times with a dose of 200 L/10 a at 2,000 fold dilutions with different treatment dates before harvest. Harvested Cnidium officinale Makino were dried following custom processing. Pesticide treatment samples closest to the harvest date were analyzed for residues in fresh samples to calculate processing factors. The method limit of detection (MLOD) was 0.004 mg/kg for two pesticides in dried or fresh samples. Average recovery rates were 89.7-95.9% and 96.6-111.1% for mandipropamid and metalaxylM. Mandipropamid were detected in the range of 1.462-2.427 mg/kg and 0.515-0.542 mg/kg as dried and fresh sample, respectively. metalaxyl-M residues were shown range of 0.020-0.443 mg/kg and 0.097-0.141 mg/kg as dried and fresh sample, respectively. Residual concentration of mandipropamid and metalaxyl-M in the crop was increased as spraying more closer to harvest day. Also, The dried sample showed higher residual amount than the fresh sample in the same treatment. The processing factors of mandipropamid and metalaxylM were 4.36 and 3.52, respectively. The %ADIs of the two pesticides in the crop were less than 0.8%.