Sectional power-law correction for the accurate determination of lutetium by isotope dilution multiple collector-inductively coupled plasma-mass spectrometry
Sectional power-law correction for the accurate determination of lutetium by isotope dilution multiple collector-inductively coupled plasma-mass spectrometry
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DOI：
10.1016/j.sab.2009.09.006
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发表时间：
2009-11
期刊：
影响因子：
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通讯作者：
Honglin Yuan;Honglin Yuan;Shan Gao;Shan Gao;C. Zong;M. Dai
中科院分区：
文献类型：
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作者：
Honglin Yuan;Honglin Yuan;Shan Gao;Shan Gao;C. Zong;M. Dai
在这项研究中，我们采用分段幂律（SPL）校正，提供了准确和精确的测量176 Lu/175 Lu的比例在地质样品中使用多个收集器电感耦合等离子体质谱（MC-ICP-MS）。根据化学色谱法测得的样品176 Lu/176 Yb比值，采用三个独立的幂律。采用同位素稀释技术和SPL校正方法，对美国地质调查局岩石标准（BHVO-1、BHVO-2、BCR-2、AGV-1和G-2）中的镥含量进行了测定，结果与推荐值吻合较好。通过常规ICP-MS和INAA获得的结果通常高于通过ID-TIMS和ID-MC-ICP-MS获得的结果;这种差异可能反映了氧化物干扰和不准确的校正。
In this study, we employ a sectional power-law (SPL) correction that provides accurate and precise measurements of176Lu/175Lu ratios in geological samples using multiple collector-inductively coupled plasma-mass spectrometry (MC-ICP-MS). Three independent power laws were adopted based on the176Lu/176Yb ratios of samples measured after chemical chromatography. Using isotope dilution (ID) techniques and the SPL correction method, the measured lutetium contents of United States Geological Survey rock standards (BHVO-1, BHVO-2, BCR-2, AGV-1, and G-2) agree well with the recommended values. Results obtained by conventional ICP-MS and INAA are generally higher than those obtained by ID-TIMS and ID-MC-ICP-MS; this discrepancy probably reflects oxide interference and inaccurate corrections.