中文摘要：

[目的]评价呋虫胺在水稻田中的安全性,对呋虫胺及其代谢物在水稻植株、土壤、田水中的消解动态和糙米、稻壳、植株、土壤中最终残留水平进行研究。[方法]样品用甲醇和乙腈混合溶液提取,提取液经SPE小柱净化,UPLC-MS/MS检测。[结果]呋虫胺及其代谢物DN、UF在糙米、稻壳、水稻植株、稻田土壤、稻田水中的平均回收率在75.7%~99.5%之间、相对标准偏差在1.18%~7.11%之间;呋虫胺最小检出量为1×10~（-13） g,呋虫胺代谢物DN、UF最小检出量为5×10^-13 g,在糙米、稻壳、水稻植株、稻田土壤、稻田水中的最低检测质量分数分别为0.05、0.05、0.05、0.05、0.005 mg/kg,实现了对呋虫胺及其代谢物DN、UF同时测定。呋虫胺在植株和田水中的降解半衰期分别为4.3、2.4 d,在糙米中的残留量均低于CAC、欧盟和日本规定的最大残留限量（中国尚未规定呋虫胺在糙米中的最大残留限量值）。[结论]该方法简单可靠,符合农药残留分析要求,可用于糙米、稻壳、水稻植株、稻田土壤、田水中呋虫胺及其代谢物的残留检测。

英文摘要：

[Aims ] The aims were to evaluate the safety of dinotefuran in rice paddy. The field experiments were conducted to study the residues and dynamics of dinotefuran and its metabolites of UF, DN in rice and paddy field.[Methods ] The dinotefuran and its metabolites of DN, UF in the samples were extracted with the mixture solution of methanol and acetonitrile, cleaned-up with SPE column and detected by UPLC-MS/MS. [Results ] The average recoveries of dinotefuran and its metabolites of DN, UF in rice, rice hull, rice plant, water and soil ranged from 75.7 to99.5%, and the relative standard deviations ranged from 1.18 to 7.11%. The minimum detectable quantity of dinotefuran was 1 ×10~（-13） g, the minimum detectable quantities of DN and UF were 5 ×10^-13 g, and the minimum detectable concentrations in rice, rice hull, rice plant, water and soil were 0.05, 0.05, 0.05, 0.05, 0.005 mg/kg,respectively. The method was suitable for simultaneous determination of dinotefuran and its metabolites. The half-lives of dinotefuran in rice plant and water were 4.3 and 2.4 d, respectively, and the final residue in rice was below the maximum residue limit（MRL） established in CAC, EU and Japan（the MRL of dinotefuran in rice isn＇t regulated in China）. [Conclusions] The method is simple and reliable, meet with the requirement for pesticide residue analysis, and can be applied for determination of dinotefuran and its metabolite residues in rice, rice hull, rice plant, paddy soil and water.