2011•Chinese Journal of Health Laboratory TechnologyRequires access
Determination of trace mercury in Chinese herbal medicine by hydride generation-atomic fluorescence spectrometry with microwave digestion
Feng Bao-zhi
Open publisher page 0 citations
Abstract
Objective:To establish a method for determination of trace mercury in Chinese herbal medicine by hydride generation–atomic fluorescence spectrometry with microwave digestion.Methods: After pretreatment by microwave digestion system,trace mercury in several common Chinese herbal medicine were determined by hydride generation –atomic fluorescence spectrometry.Results: When using the nitric acid + hydrogen peroxide reagent at the ratio of 3∶1 as acid digestion reagent in the digestion process,the samples will be completely digested.Wide linear relationship was achieved in the range of 0 μg/L～4 μg/L with relative coefficient of 0.9999 and the detection limit was 0.014 μg/L with RSD of 1.99% for mercury at 1.0 μg/L.Trace mercury in the standard reference substance human hair(GBW09101) was determined incording this way.The results were in good agreement with certified value and RSD was 3.37%.Conclusion: This method for the determination of trace mercury in Chinese herbal medicine is simple,rapid,sensitive,accurate and easy to use.