摘要：A sensitive analytical method was developed for the determination of penflufen in soil based on QuEChERS followed by UPLC-MS/MS. A dissipation study of penflufen was carried out in soils under laboratory conditions. The calibration range was linear for penflufen from 0.5 to 100 pg/L, with an R2 value of 0.9996. The recoveries obtained for penflufen from Beijing soil were in the range of 87.8-109.5%, and a low limit of detection of 0.042 ^g/kg was achieved. The results showed the dissipation of penflufen in soil followed first-order reaction kinetics and the half-lives varied from 55.4 to 203.9 days. Dissipation rate of penflufen increased with temperature, and varied in three different soil types. There was no significant difference in dissipation of penflufen between anaerobic or aerobic conditions. The dissipation rate of penflufen was slower in sterile soil than in nonsterile soil. Dissipation and residue determination of penflufen showed penflufen was moderately stable in soils with different properties, under varying temperature and moisture conditions, and in sterilized soil during laboratory incubations. Soil temperature, moisture, organic matter, EC and the microbial population are key factors influencing the dissipation of penflufen in soil.
