Sroor A, el-Dine N Walley, el-Shershaby A, Abdel-Haleem A S
Nuclear Physics Laboratory, Faculty of Girls, Ain Shams University, Cairo, Egypt.
J Environ Sci (China). 2003 Jul;15(4):570-6.
Major and trace element in seven different kinds of milk powder were studied. The concentration of 24 elements were determined by ICP-OES method, from these elements 9 elements determined by INAA. The determination of trace element contents of foodstuffs, especially milk as daily drink for all peoples age which being a complex food has great importance. The elemental analysis of milk is important both as an indicator of environmental contamination and because milk is a significant pathway for toxic metal intake and a source of essential nutrients for humans. The major elements are Ca, K, Mg, Na, P and S. While trace element are B, Ba, Co, Cr, Cu, Fe, Li, Mn, Mo, Ni, Sb, Se, Sn, Sr, V, W and Zn. ICP-OES technique is shown to be a powerful tool for trace determinations in powder samples. This is shown by its use for analysis of a series of the milk powders mentioned and comparative results of other direct technique such as instrumental neutron activation analysis. Analysis of both standard reference material A-11 milk powder and NBS Orchard leaves for quality accurance had been completed, and used for a relative method calculate. The importance of the major and trace elements to human health was discussed.
研究了七种不同奶粉中的常量元素和微量元素。采用电感耦合等离子体发射光谱法（ICP-OES）测定了24种元素的浓度，其中9种元素采用仪器中子活化分析法（INAA）测定。食品中微量元素含量的测定，尤其是作为各年龄段人群日常饮品的牛奶，这种复杂食品的微量元素含量测定具有重要意义。牛奶的元素分析既作为环境污染的指标很重要，又因为牛奶是有毒金属摄入的重要途径以及人类必需营养素的来源而很重要。常量元素有钙、钾、镁、钠、磷和硫。而微量元素有硼、钡、钴、铬、铜、铁、锂、锰、钼、镍、锑、硒、锡、锶、钒、钨和锌。电感耦合等离子体发射光谱技术被证明是测定粉末样品中微量元素的有力工具。这通过将其用于分析上述一系列奶粉以及与其他直接技术（如仪器中子活化分析）的对比结果得以体现。已完成对标准参考物质A-11奶粉和美国国家标准局果园树叶的质量保证分析，并用于相对方法计算。讨论了常量元素和微量元素对人类健康的重要性。
