ICP-AES Determination of Trace Amounts of Lead in Anti-cancer Traditional Chinese Medicines Prepared from Animals

The traditional Chinese (TCM) medicine sample was treated with microwave assisted digestion.Lead in the prepared solution was determined by a continuous hydride generator combined with ICP-spectrometer.Lead hydride generation was carried out in an alkaline medium containing ferricyanide and borohydride.Working conditions for lead determination were systematically optimized.Detection limit (3σ) of the method was 0.72 μg·L-1 and RSD (n=11) was 1.22%.The proposed method was applied to the deternation of lead in 5 TCM samples,and test for recovery based on these samples were made giving values of recovery ranged in 96.6%-100.1%.