Major element analysis of natural silicates by laser ablation ICP-MS
Major element analysis of natural silicates by laser ablation ICP-MS
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DOI：
10.1039/c001391a
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发表时间：
2010-01-01
影响因子：
3.4
通讯作者：
Hirschmann, Marc M.
中科院分区：
文献类型：
--
作者：
Humayun, Munir;Davis, Fred A.;Hirschmann, Marc M.
以前对天然硅酸盐的完整化学分析仅通过将激光烧蚀电感耦合等离子体质谱(ICPMS)与电子探针(EMP)分析相结合来提供有关主要元素成分的补充信息。在这里，我们提出了一种激光烧蚀电感耦合等离子体质谱分析硅酸盐玻璃和矿物中主要元素的方法，当使用193 nm激光系统与电感耦合等离子体质谱联用时，其精密度和准确度可与电磁脉冲技术相媲美。USGS玻璃标准物质BCR-2G和BHVO-2G的重复分析内精密度为1-4%，准确度优于5%。此外，LA-ICP-MS方法被应用于非均相硅酸盐的体积平均分析，以产生比EMP更精确的成分，并且对次要元素，特别是MnO，更准确。
The complete chemical analysis of natural silicates has previously been accomplished only by combining laser ablation ICP-MS with electron microprobe (EMP) analysis to provide complementary information on major element constituents. Here, we present a method for laser ablation ICP-MS analysis of major elements in silicate glasses and minerals that, when applied using a 193 nm laser system coupled to an ICP-MS, provides precision and accuracy comparable to that of EMP techniques. Replicate analyses of USGS glass reference materials BCR-2G and BHVO-2G have internal precision of 1-4%, and are accurate to better than 5%. Further, the LA-ICP-MS method was applied to volume-averaged analysis of a heterogeneous silicate to yield compositions that are more precise than EMP and more accurate for minor elements, particularly MnO.