Tobacco Science & Technology, 2010, 10, p. 41-43., ISSN.1002-0861

Determination of acetamiprid and imidacloprid residues in tobacco by UPLC-MS/MS

1. Shandong Provincial Institute of Product Quality Supervision & Inspection, Jinan 250100, P.R. China; 2.Technology Center of China Tobacco Shandong Industrial Corporation, Jinan 250013, P.R. China

The residues of acetamiprid and imidacloprid in 31 tobacco samples were determined. The tobacco sample was extracted with acetic acid-acetonitrile, then cleaned up with matrix solid-phase dispersion extraction, and detected by UPLC- MS/MS. The results showed that: 1) The limits of detection were 0.01mg/kg for both pesticides, the average recoveries of acetamiprid and imidacloprid were in the range of 91.6% to 102.5% and 90.1% to 102.1% with the relative standard deviations of 3.59% to 4.52% and 3.85% to 4.47%, respectively. 2) The detection rates of acetamiprid and imidacloprid residues were about one fifth and one fourth in 31 tobacco samples, the detected levels ranged from 15.5 to 243.1 ?g/kg and from 22.4 to 179.5 ?g/kg, respectively.