| 规范残留试验下阿维菌素在油白菜和结球甘蓝中的残留及消解动态 |
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| 引用本文： | 袁蕾,李建中,莫汉宏,郭宝元,王会利.规范残留试验下阿维菌素在油白菜和结球甘蓝中的残留及消解动态[J].农药学学报,2010,12(2):185-189. |
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| 作者姓名： | 袁蕾 李建中 莫汉宏 郭宝元 王会利 |
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| 作者单位： | 1.中国科学院 生态环境研究中心,北京 100085 |
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| 基金项目： | 农业部药检所农药登记残留项目(2008P500). |
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| 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 campestris L.和结球甘蓝Brassica oleracea L.var.capitata L.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0.005~0.100 mg/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3 ng,最低检测浓度(LOQ)为0.005 mg/kg。用一级动力学方程拟合消解动态试验结果,R2为0.900 5~0.973 8,阿维菌素在油白菜和结球甘蓝中的半衰期分别为1.3 ~1.7 d 和1.4 ~1.6 d。最终残留试验结果表明,分别在末次施药后7 d和3 d,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~0.043 mg/kg和未检出~0.035 mg/kg,均低于我国规定的最大残留限量(MRL)值0.05 mg/kg。
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| 关 键 词： | 阿维菌素 油白菜 结球甘蓝 残留 消解动态 |
| 收稿时间： | 2/8/2010 12:00:00 AM |
| 修稿时间： | 2010/4/27 0:00:00 |
Residue and decline dynamics of abamectin in Brassica campestrisand Brassica oleracea under supervised field trials |
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| YUAN Lei,LI Jian-zhong,MO Han-hong,GUO Bao-yuan and WANG Hui-li.Residue and decline dynamics of abamectin in Brassica campestrisand Brassica oleracea under supervised field trials[J].Chinese Journal of Pesticide Science,2010,12(2):185-189. |
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| Authors: | YUAN Lei LI Jian-zhong MO Han-hong GUO Bao-yuan and WANG Hui-li |
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| Institution: | 1.Research Center for Eco-environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China |
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| Abstract: | 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 to 0.100 mg/kg,average recoveries of abamectin in Chinese cabbage and head cabbage were 90.1% －93.2% and 87.7% －93.0%,with relative standard deviation (RSD) of 2.3% －4.7% and 3.1% －6.3%,respectively;limit of determination (LOD) and limit of quantification (LOQ) of this method were 3 ng and 0.005 mg/kg,respectively.Results of decline study showed that the degradation of abamectin in Chinese cabbage and head cabbage fit first-order model with R2 ranged between 0.900 5 －0.973 8,and half lives were 1.3－1.7 d and 1.4－1.6 d,respectively.Terminal residue experiments showed that level of abamectin residue in Chinese cabbage and head cabbage declined below the MRL of 0.05 mg/kg 7 and 3 days after the last spray with residue ranges of not detected to 0.043 mg/kg and not detected to 0.035 mg/kg,respectively. |
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| Keywords: | abamectin Brassica campestris L Brassica oleracea L var capitata L residue decline |
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