【摘要】 研究了 4 6%莎阔丹 (40 %灭草松 + 6% 2甲 4氯 )水剂在稻田环境中的残留动态 ,建立了样品前处理方法和分析方法。莎阔丹在稻田水、土壤、鲜植株、糙米样品中的添加回收率均大于 80 %。在稻田水中灭草松的半衰期为 0 .6～ 1.3d,2甲 4氯的半衰期为 0 .9～ 1.3d;土壤中灭草松半衰期为1.5～ 1.9d,2甲 4氯半衰期为 4 .3～ 6.9d;在水稻鲜植株中灭草松半衰期为 1.0～ 1.3d,2甲 4氯半衰期为 2 .4～ 2 .6d,降解较快。收获期土壤和水稻籽粒中灭草松和 2甲 4氯的残留量均低于各自MRL值更多还原

【Abstract】 The residual dynamics of basagran M 60 (bentazone+ MCPA) in rice field were determined by HPLC.The fortified recoveries of bentazone and MCPA from water,soil, rice seeding and water brown rice were above 80%. Half-life of bentazone was 0.6～1.3,1.5～1.9 and 1.0～1.3 days in water,soil, rice seeding respectively . Half-life of MCPA was 0.9～1.3, 4.3～6.9 and 2.4～2.6 days in water,soil, rice seeding respectively.Basagran M 60 degraded relatively fast.The final residues in soil and brown rice were all below their detectable limit of 0.004 mg/kg and 0.008 mg/kg.更多还原