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.
出处
《农药》
CAS
北大核心
2011年第1期46-47,57,共3页
Agrochemicals
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
