保健食品中钙含量的测定及风险分析

Determination and risk evaluation for calcium element in health care food

目的建立保健食品中钙元素含量的测定方法,并评价保健食品中钙元素含量叠加普通膳食所造成的钙元素蓄积的风险性。方法采用火焰-原子吸收分光光度法测定保健食品中的钙元素含量。以微波消解法制备测定样品,通过实验优化确定火焰类型、空气-乙炔气流量比例、释放剂氧化镧用量。然后对2011-2014年陕西省84批市售含钙保健食品中钙元素的含量进行测定。结果优化后的实验条件为：火焰类型为空气-乙炔火焰,比例为2：1,氧化镧用量为0.2%。经测定,84批含钙类的保健食品中钙元素日摄入剂量均值为152±14.1 mg。结论本研究优化的方法能够快速、准确地测定保健食品中的钙元素含量。另外,摄入含钙保健食品能够在一定程度上补充膳食中钙元素不足的现状,并且不会危害普通居民的膳食安全。

Objective To establish a method of the determination of calcium element content in health food, and evaluate its accumulated risk with overlaid daily meal intake. Methods The flame atomic absorption spectrometry was used to determinate the amount of calcium element content in health food. Samples were digested by microwave digestion system, and then the optimized condition including the flame type, air-acetylene ratio and addition of releasing agent of La_2O_3 were determined. The calcium element content in 84 batches of health food samples obtained from the market in Shaanxi province during 2011-2014 were analyzed. Results The optimized conditions were as follows： the flame type was air-acetylene flame, the ratio was 2：1, and addition of releasing agent of La_2O_3 was 0.2%. The mean value of daily intake of calcium element from health care food was 152±14.1 mg. Conclusion The optimized method is rapid and accurate, which can be helpful for the determination of calcium element in health care foods. In addition, the intake of calcium in health care food can supplement the deficiency of dietary calcium in the status quo to some extent, and will not harm dietary safety of ordinary residents.