In situ simultaneous measurement of Rb-Sr/Sm-Nd or Sm-Nd/Lu-Hf isotopes in natural minerals using laser ablation multi-collector ICP-MS
In situ simultaneous measurement of Rb-Sr/Sm-Nd or Sm-Nd/Lu-Hf isotopes in natural minerals using laser ablation multi-collector ICP-MS
复制标题
使用激光烧蚀多接收器 ICP-MS 原位同步测量天然矿物中的 Rb-Sr/Sm-Nd 或 Sm-Nd/Lu-Hf 同位素
DOI：
10.1039/c4ja00449c
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发表时间：
2015
影响因子：
3.4
通讯作者：
Xie Lie-Wen
中科院分区：
文献类型：
--
作者：
Huang Chao;Yang Yue-Heng;Yang Jin-Hui;Xie Lie-Wen
本研究提出了一种利用两台多接收电感耦合等离子体质谱仪（MC-ICP-MS）与193 nm准分子激光烧蚀系统相连接，同时测定天然矿物中Rb-Sr/Sm-Nd或Sm-Nd/Lu-Hf同位素的组合方法。由氦气携带出HelEx室的烧蚀材料被分成具有不同比例的两股气流，分成用于Sr（或Nd）分析的Neptune和用于Nd（或Hf）分析的Neptune Plus。实验表明，Neptune和Neptune Plus MC-ICP-MS（3：7、5：5和7：3）的烧蚀材料的不同比例在分析不确定度范围内未显示磷灰石和钾霞石上Sr-Nd同位素的任何显著偏差。 因此，该技术适用于同时测定天然矿物中的Rb-Sr和Sm-Nd或Sm-Nd和Lu-Hf同位素，如磷灰石、钙钛矿、钾霞石和纯斜长岩中的Sr-Nd同位素，纯斜长岩和锆英石中的Nd-Hf同位素。
This study presents a combined methodology of simultaneously measuring Rb–Sr/Sm–Nd or Sm–Nd/Lu–Hf isotopes in natural minerals by a means of two multiple collector inductively coupled plasma mass spectrometers (MC-ICP-MSs) connected to a 193 nm excimer laser ablation system. The ablated materials carried out of the HelEx cell by helium gas are split into two gas streams with different proportions into the Neptune for Sr (or Nd) analyses and Neptune Plus for Nd (or Hf) analyses. Experiments show that the different proportions of the ablated material for the Neptune and Neptune Plus MC-ICP-MS (3 : 7, 5 : 5 and 7 : 3) do not show any significant bias for the Sr–Nd isotopes on apatite and loparite within analytical uncertainties. Therefore, we conclude that this technique is suitable to simultaneously measure Rb–Sr and Sm–Nd or Sm–Nd and Lu–Hf isotopes in natural minerals, such as apatite, perovskite, loparite and eudialyte for Sr–Nd isotopes as well as eudialyte and zirconolite for Nd–Hf isotopes.