Use of pressurized liquid extraction for the simultaneous analysis of 28 polar and 94 non-polar pesticides in agricultural soils by GC/QqQ- @entity15 / @entity15 and UPLC/QqQ- @entity15 / XXXX .

@entity1046 @entity1042 @entity20346 @entity1304 @entity15 @entity9687
Due to the wide range of pesticides that can be used in agriculture, the development of fast multiresidue methods that simultaneously determine polar and non-polar pesticides is greatly demanded. This study shows the development and validation of a multiresidue method for the analysis of 98 non-polar pesticides and 28 polar pesticides in soil. A simultaneous extraction step by pressurized liquid extraction was utilized. The optimum results were obtained using @entity1046 - @entity1042 (3:1, v/v) with 2 min of preheat time and 85 degrees C as the extraction temperature. The final determination of non-polar pesticides was performed by GC, whereas polar pesticides were determined by ultra-performance liquid chromatography (UPLC). Both GC and UPLC were coupled to triple-quadrupole analyzers operating in tandem @entity15 . The optimized extraction procedure was validated. The average extraction recoveries were in the range 72-108% (10 microg/kg) and 71-106% (50 microg/kg), with RSD values < or = 26%. The matrix effect was also evaluated, and matrix-matched standard calibration was finally applied for quantification. The suitability of the method was also checked by the analysis of a certified reference material. Furthermore, 26 real soil samples were analyzed by the proposed methods in order to assess their applicability. Several pesticides (e.g., @entity9687 , @entity20346 , or @entity1304 ) were found in the samples.
