then extracts were cleaned up with Strata X-CW cartridges. The identity of analytes was confirmed usingliquid chromatography tandem mass spectrometry. All compounds were separated on a Luna C18 col-umn with gradient elution. The whole procedure was validated according to the requirements of SANCO12571/2013. The average recoveries of the analytes ranged from 85.3% to 112.0%, repeatabilities werein the range of 2.8–11.2%, within-laboratory reproducibility was in the range of 3.3–14.6%, the limitsof quantitation were in the range of 0.1–0.5 g kg−1, depending of analyte and matrices. The validatedmethod was successfully applied for the determination of clothianidin, imidacloprid and imidaclopridurea in real incurred honey bee samples and clothianidin in honey.© 2015