Determination of Trace Lead in Spicery by Microhydride Generation-Atomic Fluorescence Spectrophotometry

A method for the determination of trace Pb in spicery by XDYⅢ atomic fluorescence spectrophotometer with microhydridegenerator was developed. The results showed that the hydrogenation reaction system was stable in acid medium. The interference from elements such as Fe, Co, Ni, Cu and hydride forming elements on Pb determination was investigated and the results indicated that high contents of interference elements were endurable.The detection limit of the method for Pb was 0.30 ng/g and the recovery was 87.5%~100.0% with precision of 1.1%RSD(n=11). The method has been applied to the determination of trace Pb in spicery with satisfactory results and can be used in the analysis of practical samples.