Determination of the heavy metal elements in tobacco by ICP-MS with microwave digestion

6 heavy metal elements in 11 tobacco samples were determined by inductively coupled plasma mass spectrometer with microwave digestion.The condition of microwave digestion and inductively coupled plasma mass spectrometer determination were studied.The detection limits of Cr,Ni,As,Se,Cd and Pb were less than 1 μg /L and the RSD(n=6) of the elements was between 0.29% and 3.55%.Recoveries of spiked samples were in the range of 90.6 % and 104.9%.The method is simple,rapid,sensitive and accurate,which can meet the demand for trace heavy metal elements analysis in tobacco samples.