【摘要】 <正> 硒是人体内必需的元素,它对预防癌症、心血管病、早衰、胃病等有明显疗效,但食入过量的硒则对人体有害。对食物含硒量的测定已成为食品分析中常见的分析项目。近来报道了氢化物发生一原子吸收流动注射分析测定环境样品中痕量硒的方法。本文作者将上述体系和技术用于鲜鸡蛋中硒的测定,对测定前的四种不同湿法消煮进行了比较。更多还原

【Abstract】 A comparison was made between four different wet digestion methods for the determination of Se in eggs by hydride generation AAS using a flow injection system. The coefficient of variation for the HNO3-HClO4 HNO3-(NH4)2S2O3 and HNO2-pr-essurized teflon bomb methods were, 6.7-9.9% 7.4% and 7.6% respectively, and the percentage recoveres were 90-105%, 92%and 97% respectively. The HNO3-H2SO4 method was not able to decompose the organic material completely, and the sample was easily carbonized giving low results.更多还原