Simultaneous determination of neonicotinoid pesticides in tea-tree plantation soil by ultra-performance liquid chromatography tandem mass spectrometry

The objectives of this study were to investigate the sample preparation procedure (sample extraction and clean-up), validate the analytical method of neonicotinoids, and apply the validated method to several tea-tree plantation soils (Yen Bai and Lam Dong, Vietnam) to evaluate the levels of these pesticides.