Determination of Barium Isotopic Ratios in River Water on the Multiple Collector Inductively Coupled Plasma Mass Spectrometer | |
Gou, Long-Fei1,2; Deng, Li1 | |
2019-05-01 | |
发表期刊 | ANALYTICAL SCIENCES |
ISSN | 0910-6340 |
卷号 | 35期号:5页码:521-527 |
摘要 | Barium (Ba) isotopes have been booming while providing ubiquitous traceability to various geochemical/oceanographical processes in recent years. Accurate and precise determinations of Ba isotopes is the main precondition to apply them to tracing various processes. However, a particular determination method is lacking for Ba isotopic ratios in river water. Compared to the double-spike method which needs expensive spikes, intensive laboratory operation, and complex calibration, sample-standard bracketing (SSB) is an easier and more convenient method to obtain isotopic data on the multiple collector inductively coupled plasma mass spectrometer. In this study, to obtain the Ba isotopic ratio of river water samples with a rather lower Ba concentration than igneous rock, we experimented with K, Ca, Na, Mg, and Ce doping tests. The acidity and concentration matches to explore suitable SSB method conditions for river water Ba isotopic determinations on an MC-ICP-MS. The results showed no obvious matrix effects to Ba isotopes when K/Ba, Ca/Ba, Na/Ba, and Mg/Ba <5, and Ce/Ba <0.2, indicating that the matrix effects are negligible after column purification of Ba. HNO3 concentration match tests showed that within a 25% acidity difference, there would be also no systematic effects to a Ba isotopic determination. However, Ba isotopic determinations are highly sensitive to the Ba concentration difference between the standard and the sample. We observed a mismatch between the Ba concentration and its isotopic ratios, even when the concentration was strictly within a 5% difference. Nevertheless, the on-peak zero strategy (i.e. subtraction of HNO3, gas, and instrumental blanks) worked well to solve the mismatch situation. With this easy strategy, the Ba isotopic ratios of batch natural rive-water samples with various Ba concentrations will become easily accessible. |
关键词 | Barium isotopes river water doping tests acidity match concentration match multi collector inductively coupled plasma mass spectrometer |
关键词[WOS] | FRACTIONATION ; PRECIPITATION ; METEORITES ; WITHERITE ; CARBONATE ; ARAGONITE ; CYCLE ; BA |
收录类别 | SCI |
语种 | 英语 |
资助项目 | National Natural Science Foundation of China[41773149] ; Chinese Academy of Sciences[QYZDJ-SSW-DQC033] ; Chinese Academy of Sciences[132B61KYSB20170008] |
WOS研究方向 | Chemistry |
项目资助者 | National Natural Science Foundation of China ; Chinese Academy of Sciences |
WOS类目 | Chemistry, Analytical |
WOS记录号 | WOS:000469901700008 |
出版者 | JAPAN SOC ANALYTICAL CHEMISTRY |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/13889 |
专题 | 加速器质谱中心 |
通讯作者 | Gou, Long-Fei |
作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Gou, Long-Fei,Deng, Li. Determination of Barium Isotopic Ratios in River Water on the Multiple Collector Inductively Coupled Plasma Mass Spectrometer[J]. ANALYTICAL SCIENCES,2019,35(5):521-527. |
APA | Gou, Long-Fei,&Deng, Li.(2019).Determination of Barium Isotopic Ratios in River Water on the Multiple Collector Inductively Coupled Plasma Mass Spectrometer.ANALYTICAL SCIENCES,35(5),521-527. |
MLA | Gou, Long-Fei,et al."Determination of Barium Isotopic Ratios in River Water on the Multiple Collector Inductively Coupled Plasma Mass Spectrometer".ANALYTICAL SCIENCES 35.5(2019):521-527. |
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