Accurate Measurement of Rare Earth Elements by ICP‐MS after Ion‐Exchange Separation: Application to Ultra‐Depleted Samples
Accurate Measurement of Rare Earth Elements by ICP‐MS after Ion‐Exchange Separation: Application to Ultra‐Depleted Samples
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DOI：
10.1111/j.1751-908x.2011.00116.x
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发表时间：
2012-03
影响因子：
3.8
通讯作者：
M. Ulrich;S. Bureau;C. Chauvel;C. Picard
中科院分区：
文献类型：
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作者：
M. Ulrich;S. Bureau;C. Chauvel;C. Picard
本研究报告了对八种地质参考材料测量的稀土元素 (REE) 的精确数据，其中五种富含 REE（BE-N、BHVO-2、BR、BR-24 和 RGM-1），三种富含 REE（BIR-1、UB-N 和 DTS-2）。使用离子交换色谱程序分离 REE 后，通过四极杆 ICP-MS 获取数据。所有测得的 REE 丰度与文献中先前发表的高质量测量结果相似，误差在约 5% 范围内（对于 REE 最贫化的样品 DTS-2，为 10%）。我们还表明，通过使用内部 Tm 尖峰，数据的再现性提高至 ∼ 1%。将该技术应用于超贫化岩石样品（sub ng g−1）的分析，我们表明相对于常规微量元素测量方法获得了显着的改进。球粒陨石标准化图案是平滑的，而不是显示出不规则性。尽管经典方法在富含稀土元素的样品上给出了优异的结果，但我们相信我们的技术提高了高度稀土元素贫化岩石的测量精度和准确度。
This study reports precise and accurate data for rare earth elements (REE) measured on eight geological reference materials, five enriched in REE (BE‐N, BHVO‐2, BR, BR‐24 and RGM‐1) and three very depleted in REE (BIR‐1, UB‐N and DTS‐2). Data were acquired by quadrupole ICP‐MS after isolation of the REE using an ion‐exchange chromatography procedure. All the measured REE abundances were similar within ≈ 5% (10% for the most REE‐depleted sample DTS‐2) to the high‐quality measurements previously published in the literature. We also show that by using an internal Tm spike, the reproducibility of the data was improved to ∼ 1%. Applying this technique to the analysis of ultra‐depleted rock samples (sub ng g−1), we show that significant improvements were obtained relative to the routine trace element measurement method. The chondrite‐normalised patterns were smooth instead of displaying irregularities. Although the classical method gives excellent results on REE‐rich samples, we believe that our technique improves the precision and accuracy of measurements for highly REE‐depleted rocks.