苄嘧磺隆在水稻上的残留降解研究

Residue study of bensulfuron methyl on rice:

报道了苄嘧磺隆在水稻上的残留量分析方法。样品经提取、液 液分配、C 18小柱净化 ,添加浓度 0 .0 1～ 2 .0 0mg/kg ,回收率可达到 73.5%～ 96.3%。北京、杭州两地的试验结果表明 :①残留消解半衰期 ,田水为 3.0～ 3.5d ,植株为 6.8～ 8.1d ,土壤为 17.6～ 2 2 .1d。② 30 %威农可湿性粉剂每 666.7m2 有效量 5.0～ 7.5g施用 ,糙米、谷壳、土壤、植株中的残留量≤ 0 .0 3mg/kg。

Residue determination of bensulfuron methyl on rice was studied.Samples were extracted,liquid liquid partitoned,and cleaned up through C 18 cartridge.Fortified with 0.01-2.00 mg/kg,the recovery rates amounted to 73.5%-96.3%.Result of the two site experiments showed that:(1)Half life:3.0-3.5 days in field water,6.8-8.1 days in straw,17.6-22.1 days in soil;(2)Applying 5.0-7.5 g bensulfuron methyl every 666.7 m 2,the final residue in rough rice,husk,soil,rice straw was all ≤0.03 mg/kg.