| Effects of different cone combinations on accurate and precisedetermination of Li isotopic composition by MC-ICP-MS | |
| Gou,LF(Gou,Longfei)1,2; Jin,ZD(Jin,Zhangdong)1,3; Deng,L(Deng,Li)1; He,MY(He,Maoyong)1; Liu,CY(Liu,Chunyao)1,2; Jin,Zhangdong | |
| 2018-08 | |
| 发表期刊 | Spectrochimica Acta Part B
 |
| 卷号 | 146期号:2018页码:1-8 |
| 文章类型 | 期刊论文 |
| 摘要 | The multiple collector inductively coupled plasma mass spectrometer (MC-ICP-MS) is booming to be a high-precision, fast, and accurate instrument in measuring lithium (Li) isotopes. Modified highly sensitive Jet sample and X skimmer cones have largely upgraded analytical sensitivity and reduced sample consumption with distinct instrumental mass bias behaviors. Herein, four available combinations of the sample and skimmer cones [Jet sample cone + X skimmer cone (Jet + X), Standard sample cone + X skimmer cone (Standard + X), Standard sample cone + H skimmer cone (Standard + H), and Jet sample cone + H skimmer cone (Jet + H)] were tested for their effects on peak shape, sensitivity, mass bias behavior, and accuracy and precision of Li isotopic measurements in solution mode. The results showed that all four combinations were able to attain an ideal peak shape by adjusting the associated parameters, with a positively linear relation between 7Li (and 6Li) signals and Li concentrations. For a given Li concentration, the sensitivities were enhanced 3–7 times using the Standard + X, the Jet + H, and the Jet +X combinations compared to that of using the Standard + H. The enhanced sensitivity is attributable to more plasma ions introduced into the mass spectrometer through the Jet and X cones. Mass bias is distinct for different cone combinations, with a slight difference with various Li concentrations, indicating the neccesity of concentration match during measurement. Among the four cone combinations, the best reproducibility can be obtained by using the Standard + X cones to determine precise and accurate Li isotopes for samples. Furthermore, a pretreatment by 5% HNO3 and 0.1% HF, and then 2% HNO3 prior to analyses can minimize the memory effect of Li. |
| 关键词 | Lithium Isotopes Cone Combination Mass Bias Mc-icp-ms |
| DOI | 10.1016/j.sab.2018.04.015 |
| 收录类别 | SCI |
| 所属项目编号 | 41773149 |
| 语种 | 英语 |
| 项目资助者 | National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ieecas.cn/handle/361006/5270 |
| 专题 | 加速器质谱中心 |
| 通讯作者 | Jin,Zhangdong |
| 作者单位 | 1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China 2.University of Chinese Academy of Sciences, Beijing 100049, China 3.Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an 710049, China |
| 第一作者单位 | 黄土与第四纪地质国家重点实验室（1985-2004） |
| 推荐引用方式 GB/T 7714 | Gou,LF,Jin,ZD,Deng,L,et al. Effects of different cone combinations on accurate and precisedetermination of Li isotopic composition by MC-ICP-MS[J]. Spectrochimica Acta Part B,2018,146(2018):1-8. |
| APA | Gou,LF,Jin,ZD,Deng,L,He,MY,Liu,CY,&Jin,Zhangdong.(2018).Effects of different cone combinations on accurate and precisedetermination of Li isotopic composition by MC-ICP-MS.Spectrochimica Acta Part B,146(2018),1-8. |
| MLA | Gou,LF,et al."Effects of different cone combinations on accurate and precisedetermination of Li isotopic composition by MC-ICP-MS".Spectrochimica Acta Part B 146.2018(2018):1-8. |
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