封闭压力酸溶-电感耦合等离子体质谱法同时测定电气石中29种元素

发布时间：2018-05-02 13:20

本文选题：电气石 + 轻金属元素　；参考：《岩矿测试》2017年03期

【摘要】：电气石是一种含硼的铝硅酸盐矿物,是重要的非金属矿产资源和成岩成矿作用的灵敏示踪剂,因类质同象置换普遍使其组成成分多变,主量元素为Si、B、Al、Fe和Mg,微量元素有稀土元素、Cu、Pb、Zn、Sn、Ag和Sr等。电气石的化学性质非常稳定,不能被一般的酸或碱完全溶解,本文采用硝酸-氢氟酸封闭压力溶矿,50%王水封闭压力复溶进行样品前处理,建立了电感耦合等离子体质谱法测定电气石中稀有轻金属、重金属、放射性金属、稀土元素等29种元素的分析方法。方法检出限为0.003~0.4μg/g,精密度(RSD,n=12)为0.9%~9.2%;国家标准物质的测定值与标准值基本相符,各元素的加标回收率为95%~105%。本方法解决了电气石样品难分解、复溶时易出现氢氧化铝微细残渣的问题,样品试液中B、Al、Fe等主要共存离子的干扰小,各待测元素测定结果准确、可靠。
[Abstract]:Tourmaline is a boron-bearing aluminosilicate mineral, which is a sensitive tracer for important nonmetallic mineral resources and diagenesis. The main elements are Si-Bn-Al-Fe and Mg.The trace elements include CuPbPbPbZn-Zn-Sn-Ag, Sr and so on. The chemical properties of tourmaline are very stable and can not be completely dissolved by general acid or alkali. In this paper, 50% Wang Shui sealed pressure solution of nitric acid and hydrofluoric acid is used for sample pretreatment. An inductively coupled plasma mass spectrometry (ICP-MS) method was developed for the determination of 29 rare light metals, heavy metals, radioactive metals and rare earth elements in tourmaline. The detection limit of the method is 0.003 ~ 0. 4 渭 g / g, the precision is 0. 9 ~ 9. 2, the determination value of the national standard substance is basically consistent with the standard value, the recovery of each element is 95 ~ 105. This method solves the problem that the sample of tourmaline is difficult to be decomposed and the fine residue of aluminum hydroxide is easy to appear in the resolution. The interference of the main coexisting ions such as Bu Al-Fe in the sample solution is small and the determination results of each element to be determined are accurate and reliable.
【作者单位】：山东省地质科学研究院;山东省金属矿产成矿地质过程与资源利用重点实验室;
【基金】：国土资源公益性行业科研专项(201311096-03)
【分类号】：O657.63;P575

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