Imidacloprid and acetamiprid detected at concentration levels up to 3.6 ppm in chestnut, shallot, ginger and tea

This work reports a new sensitive multi-residue liquid chromatography–tandem mass spectrometry (LC–MS/MS) method for detection, confirmation and quantification of six neonicotinoid pesticides (dinotefuran, thiamethoxam, clothiandin, imidacloprid, acetamiprid and thiacloprid) in agricultural samples (chestnut, shallot, ginger and tea). Limits of quantification (LOQs) were 0.01 mg kg−1 for chestnut, shallot, ginger sample and 0.02 mg kg−1 for tea sample. The method was satisfactorily validated for the analysis of 150 agricultural samples (chestnut, shallot, ginger and tea). Imidacloprid and acetamiprid were detected at concentration levels ranging from 0.05 to 3.6 mg kg−1.

Source:
Wen Xie, Chao Han , Yan Qian, Huiying Ding, Xiaomei Chen and Junyang Xi, Journal of Chromatography A
Volume 1218, Issue 28, 15 July 2011, Pages 4426-4433
http://www.sciencedirect.com/science/article/pii/S0021967311006546