Determination of Mercury in Chinese Padicine by Atomic Fluorescence Spectrometry

Using nitric acid-hydrogen peroxide digestion samples,nitrate as a determination medium,potassium borohydride as reducing agent,with hydride generation-atomic fluorescence spectrometry,the contect of mercury in traditional Chinese medicine.The results showed that mercury concentrations in the range of 0~10.00 ng/mL had good linear relationship(r=0.9999),the detection limit was 0.056 ng/L,the relative standard deviation was less than 4.61% and recovery was 96.6%~103.8%.