오이와 쪽파 중 살충제 diflubenzuron의 잔류소실 특성

다국어 초록 (Multilingual Abstract)

The dissipation characteristics of insecticide diflubenzuron on cucumber and shallot was investigated. The insecticide was sprayed onto the crop once or twice with 3 or 7 days interval on cucumber and shallot at the recommended rate, respectively. The samples were harvested at 0, 1, 2, 4, 6, 8, 10, 12, and 14 days after treatment on shallot, and at 0, 1, 2, 3, 5, and 7 days after treatment on cucumber. The residual pesticide was extracted with acetone, partitioned with n-hexane, purified with a silica SPE cartridge, and analyzed by HPLC/DAD (254 nm). Limit of quantitation (LOQ) of diflubenzuron were 0.02 mg/kg. Average recovery rates were 94.0~100.9%, 96.5~103.8% on cucumber and 87.5~111.8%, 94.6~110.4% on shallot at the fortification levels of 0.2 and 1.0 mg/kg, respectively. On cucumber, initial residue level were 0.12 and 0.19 mg/kg once or twice treatment. And initial residue level were 3.5 and 4.8 mg/kg on shallot. The biological half-lives of diflubenzuron on cucumber were 2.5 and 1.8 days and those on shallot were 7.3 and 8.2 days, respectively.

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