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Double Spike-Standard Addition Technique and Its Application in Measuring Isotopes

文献类型：期刊论文

作者Lu, Zhuo1; Zhu, Jian-Ming1,2; Tan, Decan2; Johnson, Thomas M.3; Wang, Xiangli4
刊名ANALYTICAL CHEMISTRY
出版日期2023-01-13
页码7
ISSN号0003-2700
DOI10.1021/acs.analchem.2c03802
英文摘要Double spike (DS) method has been extensively used in determining stable isotope ratios of many elements. However, challenges remain in obtaining high-precision isotope data for ultra-trace elements owing to the limitations of instrumental signal-to-noise ratios and the systematics of precision of DS-based measurements. Here, the DS-standard addition (SA) (DSSA) technique is proposed to improve measurements of isotope compositions of ultra-trace elements in natural samples. According to the U-shaped relationship between DS measurement uncertainty and the spike/ sample ratio, theoretical equations and an error propagation model (EPM) were constructed comprehensively. In our method, a spiked secondary standard solution with a high, precisely known spike/sample ratio is mixed with samples such that the mixtures have spike/sample ratios within the optimal range. The abundances of the samples relative to the added standards (sample fraction; fspl) and the samples' isotope ratios can then be obtained exactly using a standard DS data reduction routine and the isotope binary mixing model. The accuracy and precision of the DSSA approach were verified by measurements of cadmium and molybdenum isotopes at as low as 5 ng levels. Compared with traditional DS measurements, the sample size for isotope analysis is reduced to 1/6-1/5 of the original with no loss of measurement precision. The optimal mixing range fspl = 0.15-0.5 is recommended. The DSSA method can be extended to isotope measurement of more than 33 elements where the DS method is applicable, especially for the ultra-trace elements such as platinum group and rare earth element isotopes.
WOS关键词HIGH-PRECISION MEASUREMENT ; GEOLOGICAL SAMPLES ; MASS-SPECTROMETRY ; ICP-MS ; MOLYBDENUM ; CD ; FRACTIONATION ; GEOCHEMISTRY ; PURIFICATION ; INVERSION
资助项目National Key R&D Program of China[2019YFA0708400] ; National Natural Science Foundation of China[41973018] ; National Natural Science Foundation of China[41673017]
WOS研究方向Chemistry
语种英语
出版者AMER CHEMICAL SOC
WOS记录号WOS:000918156300001
资助机构National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/106838]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Zhu, Jian-Ming
作者单位1.China Univ Geosci Beijing, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China
3.Univ Illinois, Dept Geol, Urbana, IL 61801 USA
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Lu, Zhuo,Zhu, Jian-Ming,Tan, Decan,et al. Double Spike-Standard Addition Technique and Its Application in Measuring Isotopes[J]. ANALYTICAL CHEMISTRY,2023:7.
APA Lu, Zhuo,Zhu, Jian-Ming,Tan, Decan,Johnson, Thomas M.,&Wang, Xiangli.(2023).Double Spike-Standard Addition Technique and Its Application in Measuring Isotopes.ANALYTICAL CHEMISTRY,7.
MLA Lu, Zhuo,et al."Double Spike-Standard Addition Technique and Its Application in Measuring Isotopes".ANALYTICAL CHEMISTRY (2023):7.

入库方式： OAI收割

来源：地质与地球物理研究所

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