Determination of ruthenium contents in terrestrial minerals by isotope dilution mass spectrometry after preconcentration via distillation
Determination of ruthenium contents in terrestrial minerals by isotope dilution mass spectrometry after preconcentration via distillation
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DOI：
10.2343/geochemj.38.485
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发表时间：
2004-10
影响因子：
0.8
通讯作者：
C. Ly;H. Hidaka
中科院分区：
文献类型：
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作者：
C. Ly;H. Hidaka
通过使用酸消解和改进的蒸馏程序，通过稳定同位素稀释质谱 (IDMS) 方法测定了各种陆地矿物中的钌含量，并通过电感耦合等离子体质谱 (ICP-MS) 和负热电离质谱 (N-TIMS) 进行同位素分析。 ppb 和 ppm 样品浓度的浓度不确定度范围为 2.1% 至 6.0% (2σ)，这与以前使用 NiS 火试金和 ICP-MS 进行的工作相当，并且在某些情况下更好（Shirai 等人，2003 年）。然而，由于分析过程中计数率较低，ppt 样本的不确定性约为 20%。三种不同矿物的结果表明，这种化学溶解和分离程序对于不同 Ru 浓度（范围从 ppm 到 ppt 水平）和不同地质基质（从硫化物到硅酸盐）的样品的有效性。测量的钌丰度显示结果与钌的亲铁性质一致，并强化了钌和锇之间熔体化学的相似性。
Through the use of acid digestion and a modified distillation procedure the Ru contents in various terrestrial minerals have been determined via the stable isotope dilution mass spectrometry (IDMS) method, with isotopic analysis carried out via inductively coupled plasma mass spectrometry (ICP-MS) and negative thermal ionization mass spectrometry (N-TIMS). The uncertainties in the concentrations ranged from 2.1% to 6.0% (2σ) for ppb and ppm samples concentrations, which is comparable and in some cases better than previous work using NiS fire assay and ICP-MS (Shirai et al., 2003). However, uncertainties for ppt samples were in around 20%, due to low count rates during analysis. Results from three different mineral species show the effectiveness of this chemical dissolution and separation procedure for samples of varying Ru concentrations, ranging from ppm down to ppt levels, and varying geological matrices, from sulphides to silicates. Ru abundances measured showed results consistent with the siderophile nature of Ru, and reinforces the similarity in melt chemistry between Ru and Os.