Abstract
An effective and expeditious method was developed for continuous determination of Pb in Chinese herbal medicine of Panax Notoginseng by using graphite furnace atomic absorption spectrometry (GFAAS) with high-pressure digestion. Under the optimum conditions, the linear range of Pb was 0 to 50 µg/L, and its detection limits was 0.871 µg/L, with 2% (NH4)2HPO4 was used as matrix modifier, respectively. The precision relative standard deviations was 3.98% for determining Pb by this method, and the spike recoveries range from 93.4% to 103.0%.
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