摘要
采用超高效液相色谱法(UPLC)测定了氟虫双酰胺19.8%悬浮剂(SC)在水稻及稻田环境中的残留动态.结果表明,当氟虫双酰胺及其代谢产物NNI-des-iodo的添加量为0.05～1.0 mg·kg-1时,其在水稻田土壤、田水、稻秆、稻米和稻壳中的平均回收率为78.2%～104.8%,变异系数为1.1%～4.4%.氟虫双酰胺在2011年三地(福建福州、天津、江苏南京)的稻田水中的降解半衰期为9.8～17.3 d,土壤中10.8～22.4 d,植株中7.6～17.3 d,其在稻田水样品中检出了代谢产物NNI-des-iodo,而在土壤和植株样品中未检出.在推荐使用剂量下,于末次施药10 d后,氟虫双酰胺在水稻稻米中的残留量均低于美国规定的在稻谷上的最大残留允许量(0.5 mg·kg-1).
Residue dynamics and terminal residue of flubendiamide 19.8% suspension concentrate（SC） in rice and field environment were measured by ultra performance liquid chromatography（UPLC）.As flubendiamide and its metabolite were applied at a range of concentrations from 0.05 to 1.0 mg·kg-1,average recoveries of them in soil,water,rice straw,rice grain and rice hull samples ranged from 78.2% to 104.8%,with variation coefficients of 1.1%-4.4%.One-year and three-area results showed that the half-life of gradation for flubendiamide was 9.8 to 17.3 d in water,10.8 to 22.4 d in soil,and 7.6 to 17.3 d in rice plants,respectively.Residues of metabolite NNI-des-iodo in water were detected,but not in soil or rice plants.When flubendiamide was applied at the recommended dose,its residue in rice grain on the 10th day after application was lower than 0.5 mg·kg-1,the maximum residue limit allowed by US for agricultural chemical residues in rice.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2013年第2期740-745,共6页
Environmental Science
基金
中央级公益性科研院所基本科研业务费专项
关键词
氟虫双酰胺
水稻
残留
降解
超高效液相色谱
flubendiamide
rice
residue
degradation
ultra performance liquid chromatography （UPLC）
