异丙威在稻田土壤中的残留检测方法

建立稻田土壤中异丙威的气相色谱测定方法。稻田土中的异丙威经二氯甲烷液液分配提取后,用气相色谱氮磷检测器(GC-NPD)测定,以保留时间定性,外标法定量。方法的线性范围为0.20-40μg/mL,r=0.9994,回收率为86.86-92.91%,RSD为0.70-2.27%。结果表明该方法灵敏、准确,并能很好地排除干扰,可满足稻田土中痕量异丙威的测定。

To develop a gas chromatography method to determine isoprocarb in paddy soil. Isoprocarb was determined by GC-NPD after extraction by methylene dichloride. Qualitative analvsis was done by retention time and quantitative analysis by extemal standard curve.The linear range of the method was 0.20-40μg/L, the correlation coefficient was 0.9994, the rates of recovery were 86.86-92.91%, RSD were 0.70-2.27%. This method is sensitive, accurate, able toeliminate the interferences and suitable for determination of trace isoprocarb in paddy soil.