摘要
目的建立一种快速准确检测保健食品中钙含量的方法。方法采用湿法和微波2种方法消解样品，火焰原子吸收光谱法测定钙含量，以10％硝酸镧溶液排除化学干扰，标准系列溶液也加入和样品相同量的硝酸镧溶液。结果依本法测定钙的检出限为0．11mg／kg，相对标准偏差（RSD）均小于5％，加标回收率为95．8％～101．9％。结论方法简便、灵敏、准确，适合保健食品的快速消解及其钙含量的定量分析。
[ Objective ] To establish a rapid and accurate method for the determination of calcium content in health foods. [ Methods ] The samples were digested by two methods of wet digestion and microwave, and the calcium content was tested by flame atomic absorption spectrometry. 10% lanthanum nitrate solution was used to eliminate the chemical interference, and the same amount of lanthanum nitrate solution was added in the standard solution. [ Results ] The detection limit of calcium was 0.11 mg/kg, the relative standard deviation （ RSD ） was less than 5% , and the recovery of standard addition was 95. 8% -101. 9%. [ Conclusion ] The method is simple, sensitive and accurate, which is suitable for rapid digestion of health foods and quantitative analysis of calcium content.
出处
《职业与健康》
CAS
2013年第17期2165-2166,2170,共3页
Occupation and Health
关键词
钙
保健食品
火焰原子吸收
微波
Calcium
Health food
Flame atomic absorption
Microwave
