建立了测定土壤中吡虫啉的方法。土壤样品以乙酸-乙腈(体积比为0.1∶100)溶液提取,分散固相萃取净化,乙腈-水为流动相(体积比为7∶13),流速0.9 mL/min,270 nm检测,外标法定量。方法的线性范围为0.1~50μg/mL,线性相关系数为0.9994。平均加标回收率为90.1%~94.5%,RSD为0.7%~4.9%(n=6)。方法检测限为0.001 mg/kg(以信噪比为3计),定量限为0.004 mg/kg(以信噪比为10计)。该方法可用于新建房屋白蚁预防土壤化学屏障中吡虫啉的检测。 A method for determination of imidacloprid in soil was established. Soil samples were extracted with acetic acid-acetonitrile (0.1: 100 by volume), dispersed and purified by SPE, acetonitrile-water as mobile phase (volume ratio 7:13), flow rate 0.9 mL / min, Legal quantity. The linear range of the method was 0.1 ~ 50μg / mL, and the linear correlation coefficient was 0.9994. The average recovery was 90.1% ~ 94.5% with RSD of 0.7% ~ 4.9% (n = 6). The limit of detection (LOD) was 0.001 mg / kg (signal to noise ratio was 3). The limit of quantification was 0.004 mg / kg (signal to noise ratio was 10). This method can be used to detect the imidacloprid in the soil chemical barrier of new house termites.