土壤中哒螨灵的残留分析方法研究

建立了哒螨灵在土壤中的残留分析方法。样品采用丙酮提取,二氯甲烷萃取,弗罗里硅土柱层析净化,GC-ECD检测。试验测得哒螨灵在土壤中的添加回收率为89.70%～92.90%,相对标准偏差为2.30%～4.70%,变异系数为2.09%～4.46%,方法的最低检出量为1×10-11g,检出限为5×10-3mg·kg-1。结果表明,该方法符合农药残留分析的要求。

Residue Analysis Method of Pyridaben in Soil

Residue analytical method for pyridaben in soil was established via sample sequentially extracted with acetone and dichloromethane, cleaned up through florisil column and determined by GC-ECD detector. The average recoveries of pyridaben in soil was 89.70% ~92.90% , and relative standard deviation was 2.30%-4.70% , with the coefficient of variation between 2.09%~4.46%, respectively. Moreover, the minimum detectable quantity was 1 ×10^-11g while the minimum detectable concentration was 5×10^-3mg ·kg^-1. In conclusion, this method is consistent with requirements of pesticide residues analytical standard.