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采用田间试验方法,研究了阿维菌素在柑橘和土壤中的残留消解动态,应用高效液相色谱法测定了阿维菌素在柑橘和土壤中的残留量。结果表明:阿维菌素在0.0103～10.30mg/L范围内呈良好的线性关系,在柑橘全果、橘皮、橘肉和土壤中的平均添加回收率分别为84.46%～93.97%、83.66%～98.03%、83.35%～94.05%、90.19%～101.15%,阿维菌素的最小检出量为4.12×10-10g,在柑橘和土壤中的最低检测质量分数分别为0.01、0.01mg/kg,符合阿维菌素残留的检测要求,阿维菌素在柑橘和土壤中的半衰期分别为3.82～9.17、3.85～9.81d。20.8%阿维菌素.四螨嗪悬浮剂对水1500倍(阿维菌素3.33mga.i./L)溶液,使用2次,末次施药20d后,收获的柑橘橘皮和橘肉及土壤中阿维菌素的残留量,均低于MRL值。
Field test methods were used to study the residue digestion of abamectin in citrus and soil. The residues of abamectin in citrus and soil were determined by HPLC. The results showed that the average recoveries of abamectin in the range of 0.0103 ~ 10.30mg / L were 84.46% ~ 93.97%, 83.66% ~ 98.03%, 83.35% ~ 94.05% and 90.19% ~ 101.15%, respectively. The minimum detectable amount of abamectin was 4.12 × 10-10g, the lowest detected mass fraction in citrus and soil was 0.01,0.01mg / kg , In line with the detection of avermectin residues, abamectin in citrus and soil half-life were 3.82 ~ 9.17,3.85 ~ 9.81d. 20.8% abamectin. Four mofetil suspension 1500 times water (Abamectin 3.33mga.i./L) solution, the use of 2 times, 20d after the last administration, the harvested citrus orange peel and orange meat and Residues of avermectins in soil were lower than the MRL value.