Abstract:

Using microwave digestiongraphite furnace atomic absorption spectrometry (GFAAS), we determined the mass ratio of Pb,Cu,Ni and Mn in four kinds of traditional Chinese medicines (Psychotria rubra, Spotted ardisia, Caulis et folium schefflerae arboricolae, acanthopanax senticosus), selected and optimized matrix modifier, ashing temperature and atomization temperature. Under the selected experimental conditions, we used standard curve method to analyze the mass ratio of Pb,Cu,Ni and Mn in traditional Chinese medicines. Experimental results show that the standard curves of four kinds of heavy metal elements have good linear relationship (r>0.999). The average recovery rates are 94.6%—103.4%.

Key words: graphite furnace atomic absorption spectrometry, traditional Chinese medicine, heavy metal, microwave digestion