RESIDUAL DYNAMICS OF QUINCLORAC AND ITS METABOLITE IN RICE FIELD ENVIRONMENT AND RICE
快杀稗及其代谢产物在稻田环境和水稻中的残留动态研究

The residual dynamics of the quinclorac in rice field in northeast China was studied.The residues of quinclorac and its metabolite (BH514-1) in soil were determined by reversed phase HPLC method using a Shim-Pack CLC-CN column and methanol-water (Containing 0. 5% HAc )(40: 60 (V/V)) as mobile phase. Results of the two year's study showed that the halflife of quinclorac in soil, water and rice plant were 8-11, 2-3 and 0. 6-0. 7 days respectively.The final residues in soil, brown rice and rice straw were all below their detectable limits of 0.003, 0. 005 and 0. 012 mg/kg respectively. The residue of BH514-1 in soil was not detected.The results provided a basis for safety application of quinclorac.