Determination of Platinum‐Group Elements in OPY‐1: Comparison of Results using Different Digestion Techniques
Determination of Platinum‐Group Elements in OPY‐1: Comparison of Results using Different Digestion Techniques
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DOI：
10.1111/j.1751-908x.2008.00893.x
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发表时间：
2008-09
影响因子：
3.8
通讯作者：
L. Qi;Mei‐Fu Zhou
中科院分区：
文献类型：
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作者：
L. Qi;Mei‐Fu Zhou
国际地质分析师协会（IAG）最近准备了一种新的能力验证样品OPY-1（超镁铁质岩石），这是第二十次国际分析地球化学实验室能力验证（GeoPT 20）的基础。本文报道了用改进的Carius管、Carius管结合HF溶解和碱熔等不同消解方法测定Os、Ir、Ru、Rh、Pt和Pd的分析数据。约4-15%的铂族元素处于硅酸盐相中，即使在300 °C下用Carius管技术消化，也不能用王水浸出。Carius管技术结合HF溶解和碱熔都能获得可靠的数据。结果表明，OPY-1在2 g供试品水平下具有足够的均匀性，适合作为方法验证的参比物质。简化了Carius管的密封程序，并提供了推荐的消化程序。
A new proficiency testing sample, OPY‐1 (ultramafic rock), the basis of the twentieth international proficiency test of analytical geochemistry laboratories (GeoPT 20), was recently prepared by the International Association of Geoanalysts (IAG). This paper reports analytical data for Os, Ir, Ru, Rh, Pt and Pd with different digestion techniques, including an improved Carius tube, Carius tube combined with HF dissolution and alkaline fusion. About 4–15% of the PGEs are in the silicate phase, which cannot be leached by aqua regia even when digested at 300 °C with the Carius tube technique. Both the Carius tube technique combined with HF dissolution and alkaline fusion can obtain reliable data. The results demonstrated that OPY‐1 is sufficiently homogeneous at a 2 g test portion level to be suitable as a reference material for method validation. The procedure for sealing the Carius tube was simplified and the recommended digestion procedures are provided.