噁唑酰草胺及其代谢物在不同地区水稻上的残留和消解比较  

Comparison of Residues and Dissipation Dynamics of Metamifop and Its Metabolites in Paddy Rice from Different Regions

作　　者：何红梅[1] 徐玲英[1] 张昌朋[1] 王祥云[1] 蒋金花[1] 李艳杰 赵学平[1] HE Hongmei;XU Lingying;ZHANG Changpeng;WANG Xiangyun;JIANG Jinhua;LI Yanjie;ZHAO Xueping(State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products,Ministry of Agriculture and Rural Affairs Key Laboratory for Pesticide Residue Detection,Institute of Agro-product Safety and Nutrition,Zhejiang Academy of Agricultural Sciences,Hangzhou310021,China)

机构地区：[1]省部共建农产品质量安全危害因子与风险防控国家重点实验室(筹),农业农村部农药残留检测重点实验室,浙江省农业科学院农产品质量安全与营养研究所,杭州310021

出　　处：《现代农药》2022年第5期34-39,共6页MODERN AGROCHEMICALS

基　　金：浙江省分析测试基金项目(2018C37013)。

摘　　要：为了比较噁唑酰草胺及其代谢物在不同地区的残留量和消解规律,本研究通过田间试验和采用超高效液相色谱-串联质谱法 (UPLC-MS/MS) 研究了噁唑酰草胺及其3个代谢物(HFMPA、HPFMPA和6-CBO)在浙江和黑龙江两地水稻上的残留和消解规律。 试验结果表明,噁唑酰草胺、HFMPA、HPFMPA和6-CBO在浙江和黑龙江水稻植株上消解动态符合一级动力学方程,消解半衰期分别为4.4~11.5 d、3.8~14.4 d、2.2~13.3 d和3.9~6.4 d,受温度影响,浙江点的消解均快于黑龙江点。 同一试验地点,与低施药剂量施药相比,高施药剂量施药会导致更高的残留。 黑龙江点的土壤样品中噁唑酰草胺检出量小于或等于0.040 mg/kg,稻秆和稻壳样品检出代谢物HFMPA,残留量最高分别为0.14和0.027 mg/kg;浙江点仅在高剂量稻秆样品中检出0.018 mg/kg的代谢物HFMPA;其余均未在浙江和黑龙江样品中检出,低于定量限0.01 mg/kg。 该研究结果为该除草剂使用后在水稻不同部位和稻田环境土壤中的安全性评价提供了参考数据。In order to compare the residues and dissipation dynamics of metamifop and its metabolites on rice in different regions,a comparative study of the dissipation dynamics and residues of metamifop and its metabolites(HFMPA、HPFMPA and 6-CBO) in paddy rice was conducted by field residue trials in Zhejiang province and Heilongjiang province in China.Metamifop and its metabolites were analyzed by ultra performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS).The field trial results showed that the dissipation equations of metamifop and its metabolites in rice straw samples fitted the first-order kinetics equation.The dissipation half-life values of metamifop,HFMPA,HPFMPA and 6-CBO in rice straw of Zhejiang province and Heilongjiang province were 4.4-11.5、3.8-14.4、2.2-13.3 and3.9-6.4 d,respectively.The dissipation rates of four kinds of compounds in Zhejiang province were faster than those in Heilongjiang province because of temperature influence.The higher application doses of metamifop resulted in higher residues than lower doses at the same site.The residues of metamifop ≤0.040 mg/kg were found in soil in Heilongjiang province,and the highest residues of HFMPA in rice straw and rice hull samples were also 0.14 and 0.027 mg/kg,respectively.However,only residues of HFMPA in rice straw were found in Zhejiang province,and the highest value was0.018 mg/kg.The residues of the other compounds were not found in other samples,which were all below limits of quantifications(LOQs,0.01 mg/kg).The results could provide reference data for the safety evaluation of the herbicide in different parts of rice and paddy soil after application of metamifop.

关 键 词：噁唑酰草胺 代谢物 消解 残留 水稻 

分 类 号：TQ450.2[化学工程—农药化工] O657.63[理学—分析化学]