采用气相色谱法建立了仲丁灵在土壤中的残留分析测定方法,并试验了仲丁灵在土壤中的残留消解动态.样品采用丙酮提取,经弗罗里硅土柱净化后,采用气相色谱法测定.该方法的添加回收率为90.71％～99.06％,变异系数为0.89％～3.34％,最低检出浓度为0.05 mg/kg,最低检出量为1.89×10-10g.消解动态试验结果表明,仲丁灵按推荐使用剂量(1 800 g/hm2)和2倍推荐使用剂量(3 600 g/hm2)施药,它在土壤中的半衰期分别为9.04d和11.17d.%A method for me determination of butralin residue in soil using gas chromatography (GC) was developed and degradation dynamics of butralin was estimated. Samples of soil were extracted with acetone. The extracts were cleaned-up with a Florisil column. The residue of butralin was determined by GC method. The average recoveries ranged from 90.71% to 99.06% with relative standard deviation 0.89%-3.34%. The lowest detectable concentration of butralin in soil was 0.05 mg/kg, and the detection limit was 1.89× 10-10 g. The results showed that the half-lives of butralin in soil were 9.04 d and 11.17 d at single recommended dosage (1 800 g/hm2) and doable recommended dosage (3 600 g/hm2), respectively.
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