Determination of Trace Selenium in Selenium-enriched Foods by Intermittent Flow-hydride Generation-atomic Fluorescence Spectrometry

A method was developed for the determination of trace selenium in selenium enriched foods by intermittent flow hydride generation atomic fluorescence spectrometry.Samples were digested with a mixture of nitric acid and perchloric acid.Under the optimized condition,the linear range of the working curve was 0～100 μg/L and the correlation coefficient was 0 9999.The limit of detection was 0 06545 μg/L.The method was applied to determine trace selenium in eggs,selenium enriched rice,and selenium enriched salt.The recoveries were 90 6%,98 5%,and 104 3% respectively.