精吡氟乙草灵乳油在白菜及土壤中的残留动态

Residual Dynamic Analysis of Haloxyfop-(R)-methyl in Cabbage and Soil

采用GC-ECD测定了精吡氟乙草灵在白菜及土壤中的残留动态和最终残留量。测定结果表明:喷施10.8%精吡氟乙草灵乳油2025mL/hm2(218.7ga.i./hm2),白菜上原始沉积量0.9852mg/kg,土壤中原始沉积量0.8914mg/kg;白菜上半衰期为5d,土壤中半衰期为10d。在白菜上的最终残留量低于最大允许残留限量值(0.1mg/kg)。

The dynamic residues and final residues of haloxyfop-（R）-methyl in cabbage and soil were determined with GC-ECD. A method for pretreatment and analysis of samples was established. The cabbage was applied with haloxyfop-（R）-methyl 10.8% EC 2025 mL/ha（218.7 g a.i./ha） and the results showed that the primitive residual amount in cabbage was 0.9852 mg/kg and in soil was 0.8914 mg/kg, and that half-life of haloxyfop-（R）-methyl in cabbage was 5 d and in soil was 10 d. The final haloxyfop-（R）-methyl residue in cabbage were lower than 0,1 mg/kg.