Determination of Carbamate and Triazol Pesticides in Soil Using QuEChERS with Liquid Chromatography-Tandem Mass Spectrometry

摘要

A method for the simultaneous determination of 18 carbamate and triazol pesticides in soil using modified QuEChERS combined with liquid chromatography tandem mass spectrometry has been developed. The targets in soil were extracted by shaking extracted with acetone and dichloromethane and the extract was cleaned up by dispersive solid phase extraction, then analyzed by LC-MS-MS in the mode of multiple reactions monitoring with electrospray ionization source. Stable isotope internal standards were used for quantitative analysis. All the correlation coefficients of 18 targets were greater than 0.995. The samples spiked recoveries at a concentration level of I μg/kg and 10 μg/kg were from 64.9 to 94.2 % and from 64,7 to 104.7 ck. respectively with relative standard differences range from 1.98 through 16.83 % (n = 8). The method detection limits ranged between 0.010 and 0.130 μg/kg. The method is sensitive, simple, low-cost, fast and has been applied to detection of soil samples.