摘要
Homogeneous ionic liquid microextraction was developed for the simultaneceus extraction of dimetho- morph, mefenacet, isoprothiolane and oxadiazon from soil. 1-Butyl-3-methylimidazolium tetrafluoroborate was used as extraction solvent, and ammonium hexafluorophosphate was used as ion-pairing agent. High-performance liquid chromatography（HPLC） was employed for separation and determination of the analytes. The calibration curves show good linear relationship（r〉0.9988）. The recoveries are between 74.2% and 97.9% with relative standard devia- tions（RSDs） lower than 5.97%. The present method is free of volatile organic solvents, and expenditures of sample, extraction time and solvent are lower, compared with ultrasonic and Soxhlet extraction. There was no obvious diffe- rence in the extraction recoveries of pesticides obtained by the three extraction methods.
Homogeneous ionic liquid microextraction was developed for the simultaneceus extraction of dimetho- morph, mefenacet, isoprothiolane and oxadiazon from soil. 1-Butyl-3-methylimidazolium tetrafluoroborate was used as extraction solvent, and ammonium hexafluorophosphate was used as ion-pairing agent. High-performance liquid chromatography（HPLC） was employed for separation and determination of the analytes. The calibration curves show good linear relationship（r〉0.9988）. The recoveries are between 74.2% and 97.9% with relative standard devia- tions（RSDs） lower than 5.97%. The present method is free of volatile organic solvents, and expenditures of sample, extraction time and solvent are lower, compared with ultrasonic and Soxhlet extraction. There was no obvious diffe- rence in the extraction recoveries of pesticides obtained by the three extraction methods.
基金
Supported by the National Natural Science Foundation of China（No.51209024）.
