吡虫啉在烟草中的残留动态研究  

Study on residues of Imidaclapaid in tobacco

作　　者：杨红[1] 章维华[1] 黄丽琴[1] 杨春龙[1] 邵苏宁 陈道文[1] 

机构地区：[1]南京农业大学理学院,南京210095

出　　处：《南京农业大学学报》1999年第3期80-82,共3页Journal of Nanjing Agricultural University

摘　　要：１９９７年在江苏省灌云县烟草中进行了吡虫啉的残留试验。烟草中残留的微量吡虫啉经过溶剂提取， 柱层析纯化， 进行高效液相色谱分析。色谱柱为 Ｓｐｈｅｒｉｓｏｒｂ Ｃ１８ （１０ μｍ ） ２５０ ｍ ｍ ×４６ ｍ ｍ （ Ｉ Ｄ）； 甲醇、乙腈、水的混合液为流动相 （１ｍ Ｌ／ｍ ｉｎ）； 紫外检测波长为２４５ ｎｍ 。样品的添加回收率为８７３４％ ～９２７５％ ； 最低检测浓度为００１ ｍ ｇ／ｋｇ。试验结果表明，吡虫啉在烟草中的消解半衰期为３～４ ｄ 左右， 喷药一个月后， 最终残留量均低于００１ ｍ ｇ／ｋｇ。In 1997,the determination of Imidaclapaid residues in tobacco was performed in Guanyun County,Jiangsu Province.Residues of Imidaclapaid in tobacco were extracted by solvent, purified by column chromatography,and analysed by high performance liquid chromatography.The column used was Spherisorb C 18 (10 μm),250 mm×4 6 mm(I.D),and mobile phase was methanol,acetonitrile and water mixture solvent(1 mL/min).The eluant was detected by UV absorption at 245 nm.The recovery for residues determination was 87 34% 92 75%.The detectable limit of concentration was 0 01 mg/kg.The degradation half life of Imidaelapaid was about 3 4 days.The terminal residues were all below 0 01 mg/kg 30 days after spraying.

关 键 词：吡虫啉 烟草 残留测定 高效液相色谱 

分 类 号：S481.8[农业科学—农药学] S482.38[农业科学—植物保护]