电感耦合等离子体原子发射光谱(ICP-AES)法测定四种奶片中的钙和镁

采用HNO3-HClO4混酸体系溶解奶片,电感耦合等离子体原子发射光谱法测定试样中的钙和镁含量,结果表明非糖果型奶片中钙和镁的含量较高。通过加标回收实验,钙和镁的加标回收率为96.7%～101%,相对标准偏差均小于3%,方法准确、快捷,为研究奶片在儿童成长发育中的作用提供了相关的依据。

Determination of Ca and Mg in four kinds of milk tablets by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)

The milk tablets were dissolved by HNO3-HClO4 mixed acid system, and the contents of calcium and magnesium in the samples were determined by inductively coupled plasma atomic emission spectrometry. The results revealed that the calcium and magnesium contents in the sugar-free milk tablets were relatively high. Through spiked recovery experiments, the recoveries of calcium and magnesium were between 96.72% and 101.40%, and the relative standard deviations were lower than 3%. The method is accurate and fast, which provides a foundation for studying the role of milk tablet in children"s growth and development.