Determination of Scandium, Yttrium and Rare Earth Elements in Rocks by High Resolution Inductively Coupled Plasma‐Mass Spectrometry
Determination of Scandium, Yttrium and Rare Earth Elements in Rocks by High Resolution Inductively Coupled Plasma‐Mass Spectrometry
复制标题
DOI：
10.1111/j.1751-908x.1999.tb00557.x
复制
发表时间：
1999-06
影响因子：
3.8
通讯作者：
P. Robinson;A. Townsend;Zongshou Yu;C. Münker
中科院分区：
文献类型：
--
作者：
P. Robinson;A. Townsend;Zongshou Yu;C. Münker
高分辨率电感耦合等离子体质谱 (HR-ICP-MS) 的高灵敏度、极少的氧化物形成和单一内标能力在直接测定国际参考材料中的 Sc、Y 和 REE 得到了证明：玄武岩 (BCR-1、BHVO-1、BIR-1、DNC-1)、安山岩 (AGV-1) 和超镁铁质 (UB-N、PCC-1 和 DTS-1)。发现耗时的离子交换分离或预浓缩是不必要的。 PCC-1 和 DTS-1 中 REE 的平滑球粒陨石标准化图在 0.8-50 ng g-1（0.01-0.1× 球粒陨石）范围内获得。研究发现，方法精度取决于消解，玄武岩、AGV-1 和 UB-N 的平均外部重复性为 2-4%，PCC-1 和 DTS-1 的平均外部重复性为 10%。使用中等分辨率，45Sc 产生的质量峰完全消除了 29Si16O 和 28Si16O1H 光谱干扰，这对使用四极杆 ICP-MS 测定 Sc 的准确性产生了怀疑。经过 HR-ICP-MS 和 XRF 分析后发现，岩石标准材料中 Y 的文献值大约高 9%。
The high sensitivity, minimal oxide formation and single internal standard capability of high resolution inductively coupled plasma-mass spectrometry (HR-ICP-MS) is demonstrated in the direct determination of Sc, Y and REE in the international reference materials: basalts (BCR-1, BHVO-1, BIR-1, DNC-1), andesite (AGV-1) and ultramafics (UB-N, PCC-1 and DTS-1). Time consuming ion exchange separation or preconcentration were found to be unnecessary. Smooth chondrite normalized plots of the REE in PCC-1 and DTS-1 were obtained in the range 0.8-50 ng g-1 (0.01-0.1× chondrite). Method precision was found to be digestion dependent with an average external repeatability of 2-4% for the basalts, AGV-1 and UB-N, and 10% for PCC-1 and DTS-1. The mass peak due to 45Sc was completely resolved from 29Si16O and 28Si16O1H spectral interferences using medium resolution, which casts doubt on the accuracy of Sc determinations using quadrupole ICP-MS. Literature values for Y in rock reference materials were found to be approximately 9% high after HR-ICP-MS and XRF analysis.