电感耦合等离子体-原子发射光谱测定鱼肉中常见营养元素的样品消解方法

Comparison of Various Digestion Methods for Determination of Essential Elements in Fish by ICP-AES

使用干法灰化消解、湿法全消解和湿法半消解三种不同的样品消解方法,结合电感耦合等离子体发射光谱仪测定了淡水鱼和海水鱼两种不同鱼类中的K、Na、Ca、Mg四种常见营养元素的含量。结果表明各元素回收率在91%~109%之间,除Ca外其余元素相对标准偏差小于5%。湿法半消解同其它消解方法相比,缩短了检测时间,提高了分析效率,能够更加有效、快速、准确地测定鱼肉中的K、Na、Ca和Mg元素的含量。

Three digestion methods（dry digestion,wet total digestion and semi-digestion）combining with ICP-AES were applied for determination of four essential elements（K,Na,Ca and Mg）in two kinds of fishes（perch and salmon）.The results showed that the recoveries were in the range of 91%-109%.Except for calcium,the relative standard deviations were all less than 5%.Compared with the other two digestion methods,semi-digestion was found to be easily-operated and highly efficient with good accuracy and reproducibility,and therefore more suitable for the determination of four essential elements in fish.