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甘蓝和土壤中吡唑醚茵酯·烯酰吗啉残留分析 被引量:33

Residues Determination of PyraclostrobinoDimethomorph in Cabbage and Soil
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摘要 [目的]吡唑醚菌酯·烯酰吗啉是吡唑醚菌酯和烯酰吗啉的混合杀菌制剂,为建立该药剂在甘蓝及土壤中的残留分析方法,采用丙酮和水混合溶剂提取、二氯甲烷液液分配、中性氧化铝柱净化,GC-ItECD检测。【结果】吡唑醚菌酯和烯酰吗啉最小检出量分别为2.0×10^-11、1.0×10^-11g,实际土壤、植株添加的最低检测质量分数均为0.005mg/kg。吡唑醚菌酯和烯酰吗啉的添加质量分数分别为0.01、0.05、0.50mg/kg和0.1、1.0、5.0mg/kg,在土壤和植株中的添加回收率分别为84.8%~104-4%,96.6%~100.8%和102.0%~108.6%、96.2%~106.6%,变异系数分别为1.74%~3.67%、3.32%~3.87%和1.54%-2.78%、3.48%-3.84%。[结果]方法具有简便、准确的特点,适合甘蓝及土壤中吡唑醚菌酯·烯酰吗啉残留量的测定。 [Aims] Pyraclostrobin'dimethomorph is a mixture of pyraclostrobin and dimethomorph fungicide. A method was established for determining pyraclostrobin and dimethomorph residues in cabbage and soil. Residues were extracted with a mixture of acetone and water. Liquid-liquid extraction was used with dichloromethane. The extracts were cleaned up by a column of aluminium oxide (neutral). Residues of pyraclostrobin and dimethomorph were determined by gas chromatography equipped with micro-electron capture detector(p.-ECD). [Results] The LOD(limit of detection) of pyraclostrobin and dimethomorph were 2.0×10^-11 and 1.0×10^-11g, respectively, and the LOQ(limit of quantification) was 0.005 mg/kg. The different addition level of pyraclostrobin and dimethomorph were 0.01, 0.05, 0.50 mg/kg and 0.1, 1.0, 5.0 mg/kg, and the average recovery of soil and cabbage plant were 84.8 to 108.6% and 0.1, 1.0, 5.0 mg/kg, respectively. And coefficients of variation were 1.74-3.67%, 3.32-3.87% and 1.54-2.78%, 3.48-3.84%, respectively. [Conclusions] The method was precise and simple. It was applicable to the determination of pyraclostrobin'dimethomorph residues in cabbage and soil.
作者 王岩 姚威风 梁爽 逯忠斌 WANG Yan, YAO Wei-feng, LIANG Shuang, LU Zhong-bin (College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China)
出处 《农药》 CAS 北大核心 2011年第1期46-47,57共3页 Pesticides
基金 农业部农药残留试验项目(2007F16)
关键词 吡唑醚菌酯 烯酰吗啉 甘蓝 土壤 残留分析 pyraclostrobin dimethomorph cabbage soil residue determination
作者简介 王岩(1962-),男,副教授,主要从事农药教学与研究。Tel:0431-84510942,E-mail:wy62@163.com
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