Determination of imidacloprid residues in Chinese Cabbage by UPLC—MS/MS

摘要

A method for determination of imidacloprid in Chinese Cabbage was established by using UPLC—MS/MS. and the samples are extracted with acetontrile, and the extract is cleaned up by Florisil SPE cartridges and evaporated. Choromatographic separation was performed on a C18 column, and determined by UPLC-MS/MS. The external standard calibration curves were used for quantification. The results showed that a good linear correlation was obtained in the range of 0.005-0.1ug/mL. The limit of quantif icat ion w as 0.008 mg/kg. The average recoveries and the relative standard deviations were in the range of 84.9%～92.7% and 0.9%～6.2%, respectively. It is applicable to the determination of imidacloprid redidue in Chinese cabbage.