摘要
于2006-2007年,在北京和山东两地研究了阿维菌素在油白菜Brassica campestrisL.和结球甘蓝Brassica oleraceaL.var.capitataL.中的残留及消解动态。样品用乙腈提取,正己烷萃取,加入乙腈、N-甲基咪唑和三氟乙酸酐衍生化,后经高效液相色谱-荧光检测器(HPLC-FLD)检测。在0.005~0.100mg/kg添加水平下,采用该方法测得阿维菌素在油白菜和结球甘蓝中的回收率分别在90.1%~93.2%和87.7%~93.0%之间,相对标准偏差(RSD)分别为2.3%~4.7%和3.1%~6.3%;最小检出量(LOD)为3ng,最低检测浓度(LOQ)为0.005mg/kg。用一级动力学方程拟合消解动态试验结果,R2为0.9005~0.9738,阿维菌素在油白菜和结球甘蓝中的半衰期分别为1.3~1.7d和1.4~1.6d。最终残留试验结果表明,分别在末次施药后7d和3d,油白菜和结球甘蓝中阿维菌素的最终残留量分别为未检出~0.043mg/kg和未检出~0.035mg/kg,均低于我国规定的最大残留限量(MRL)值0.05mg/kg。
Supervised field trials were conducted in Beijing and Shandong to study the residue and decline dynamics of abamectin in Chinese cabbage(Brassica campestris L.)and head cabbage(Brassica oleracea L.var.capitata L.)from year 2006 to 2007.Abamectin was extracted by acetonitrile,partitioned by n-hexane,and then detected by high performance liquid chromatography(HPLC)with fluorescence detector(FLD)after derivatization with acetonitrile,N-methylimidazole and trifluoroacetic anhydride.At fortified level of 0.005 t...
出处
《农药学学报》
CAS
CSCD
北大核心
2010年第2期185-189,共5页
Chinese Journal of Pesticide Science
关键词
阿维菌素
油白菜
结球甘蓝
残留
消解动态
abamectin
Brassica campestris L.
Brassica oleracea L.var.capitata L.
residue
decline
