Analysis of Inorganic Contaminants in Different Soil Iayers of Chinese Traditional Herbal Field

The soil sample was pretreated with microwave-assisted digestion and contaminants in the prepared solution were then determined by atomic absorption spectrometry.Copper,zinc and chromium were determined by FAAS;lend and cadmium by GFAAS and arsenic,mercury by Hg-AFS.Arsenic shown by analytical results,amount of inorganic contaminants in soil was appeared to have an obvious tendency of highest in the upper layer and least in the lower layer.Conditions for sample pretreatment and determination were optimized.Precision and accuracy of the method were tested and reported.Recovery was in range of 88.0%-108.0%,with RSD<3.28% (n=8).