牙釉质中稀土和微量元素的ICP-MS方法检测

主要研究应用电感耦合等离子体质谱法测定牙釉质中稀土和微量元素的实验方法。实验证明牙釉质样品经硝酸-过氧化氢体系消解，样品溶解完全，可以满足ICP-MS检测方法的要求。方法的精密度用相对标准偏差表示在0.50%～6.79%之间，方法准确度以标准回收率度量在94.45%～104.78%之间,完全能满足生物样品的测试要求。本实验为口腔医学研究提出一个简便、准确和可行的研究方法的同时，也为龋齿病防治提供了有龋齿和无龋齿中样品中稀土微量元素测试数据。

Determination of Rare-Earth and Trace Elements in Teeth Enamel by Inductively Coupled Plasma Mass Spectroscopy

Determination of rare earth and trace elements in teeth enamel was studied by inductively coupled plasma mass spectroscopy. The sample was completely dissolved by HNO 3-H 2O 2. The range of precision is 0.50%-6.79% given by the relative standard deviation and the range of accuracy is 94.45%-104.78% obtained by measuring standard recovery rate. The above data satisfied completely the requirements of biological sample. While this study provides experimental data of rareearth and trace elements of teeth enamel for carious teeth and none carious teeth of human for prevention and cure of decayed tooth. A reasonable method is provided for mouth medicine research.