等离子体发射光谱法同时测定大气气溶胶中多种金属元素

Determination of Metal Elements in Aerosol by ICPAES

建立了采用等离子体发射光谱测定大气气溶胶中金属元素的方法。气溶胶样品经密封混合酸消解处理后，直接进行Ａｌ、Ｃａ、Ｍｇ、Ｋ、Ｎａ、Ｍｎ、Ｆｅ、Ｓｒ、Ｖ和Ｚｎ１０种元素的测定，方法检出限在０２～１１μｇ／Ｌ，对于０ｘ～ｘｘｍｇ／Ｌ的样品测定６次的精密度好，ＲＳＤ＜１２％，样品加标回收率为９８６％～１０５０％。方法经国家一级标样验证可行，已用于大批大气气溶胶样品的测定。

A new method for the determination of metal elements in aerosol samples by ICPAES is reported in this paper. The samples were digested firstly with HNO_3HClO_4 in a sealed vessel, then with HNO_3HF, and finally dissolved with 1.4 mol/L HNO_3. Al,Ca, Mg, K, Na, Mn, Fe, Sr, V and Zn in sample solution were determined by ICPAES. The detection limits for these elements are 0.2～11 μg/L. The recoveries these elements are 98.6%～105.0% with precision of <1.2% RSD ( n =6). The method has been verified by analysis of national standard reference materials and has been applied to the determination of the elements above in aerosol samples.