| 气相色谱法测定醚菌酯在黄瓜 和土壤中的残留量 |
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| 引用本文： | 陈长龙,李建中,吴宪,胡继业.气相色谱法测定醚菌酯在黄瓜 和土壤中的残留量[J].农药学学报,2006,8(2):191-194. |
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| 作者姓名： | 陈长龙 李建中 吴宪 胡继业 |
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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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| 摘 要： | 建立了杀菌剂醚菌酯在黄瓜和土壤中的残留分析方法,并研究了其在黄瓜和土壤中的消解动态和最终残留。 样品经丙酮超声提取、二氯甲烷液-液分配和弗罗里硅土净化后,通过GC-NPD 检测。该方法最小检出量为9×10-12 g,在黄瓜和土壤中的最低检测浓度分别为0.005和0.010 mg/kg, 添加回收率为89.4％~104.3%, 变异系数为4.6％~7.0%。残留动态试验结果表明,施药浓度为推荐剂量的两倍时(有效成分300 g/ hm2),醚菌酯在黄瓜和土壤中的半衰期分别为6.4和10.3 d。在有效成分为150和300 g/hm2的剂量条件下,施药3~4次,施药后第 5 d黄瓜中醚菌酯残留量低于欧盟规定的MRL值(0.05 mg/kg)。
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| 关 键 词： | 杀菌剂 醚菌酯 黄瓜 土壤 残留试验 |
| 文章编号： | 1008-7303(2006)02-0191-04 |
| 收稿时间： | 02 20 2006 12:00AM |
| 修稿时间： | 05 24 2006 12:00AM |
Determination of Kresoxim-methyl Residues in Cucumber and Soil by Capillary Gas Chromatography CHEN Chang-long, LI Jian-zhong, WU Xian, HU Ji-ye * |
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| CHEN Chang-long,LI Jian-zhong,WU Xian,HU Ji-ye.Determination of Kresoxim-methyl Residues in Cucumber and Soil by Capillary Gas Chromatography CHEN Chang-long, LI Jian-zhong, WU Xian, HU Ji-ye *[J].Chinese Journal of Pesticide Science,2006,8(2):191-194. |
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| Authors: | CHEN Chang-long LI Jian-zhong WU Xian HU Ji-ye |
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| Institution: | Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,China;Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,China;Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,China;Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,China |
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| Abstract: | The residue analysis method of kresoxim-methyl and its dissipation rate in cucumber and soil were studied.Kresoxim-methyl were extracted from cucumber and soil matrices with acetone,purified by liquid-liquid extraction and Florisil cartridges, and then determined by GC with NP-detector.The limit of detection was estimated to be 9×10-12 g,and the minimum determination concentration of kresoxim-methyl in cucumber and soil was 0.005 mg/kg and 0.010 mg/kg, respectively.The average recoveries ranged from 89.4% to 104.3% with a coefficient variation between 4.6% and 7.0%.The results showed that the half-lives of kresoxim-methyl in cucumber and soil were 6.4 days and 10.3 days,respectively,at double of the recommended dosage (300 g/hm2).The present study revealed that the cucumber was sprayed at 3~4 times successivvely at the recommended dosages (150 g/hm2) and double of that,the residues in cucumber were below the MRL (0.05 mg/kg,fixed by EU) after 5 days for both treatments. |
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| Keywords: | fungicide kresoxim-methyl cucumber soil residue test |
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