An improved extraction chromatographic purification of tungsten from a silicate matrix for high precision isotopic measurements using MC-ICPMS

doi:10.1039/c8ja00024g

	An improved extraction chromatographic purification of tungsten from a silicate matrix for high precision isotopic measurements using MC-ICPMS
	Mei, Qing-Feng 1,2,3; Yang, Jin-Hui 1,2,3; Yang, Yue-Heng 1,2
刊名	JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
	2018-04-01
卷号	33 期号:4 页码:569-577
ISSN号	0267-9477
DOI	10.1039/c8ja00024g
文献子类	Article
英文摘要	An improved chemical method is developed to accurately measure the W isotopic compositions of silicate samples with a precision of better than +/- 0.053 epsilon on epsilon W-182. Compared with the conventional method, two developments of this method mainly include the sample digestion process that is modified to better W dissolution from the co-precipitations and the W separation procedure. The optimized extraction chromatography using TEVA resin is designed to more efficiently separate W from Ti, Zr and Hf after the first-stage cation-exchange procedure with the percent recovery of W more than 85%. The blank during the whole procedure is less than 0.3 ng and is negligible for W isotopic analysis. The W isotopic ratios of Alfa Aesar W standard solution and a variety of silicate reference materials, i.e., RGM-2, GSP-2, AGV-2, JB-3, BCR-2 and BHVO-2, are measured by multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). RGM-2, GSP-2, AGV-2, JB-3 and BCR-2 have normal epsilon W-182 values, identical to that of the terrestrial Alfa Aesar W standard, whereas BHVO-2 has a negative epsilon W-182 value of -0.09 +/- 0.05 (2SD, N = 10). The duplicate measurements of Alfa Aesar W standard solution RGM-2 and BHVO-2 show that the external reproducibility of epsilon W-182 is usually better than 5 ppm (2SD), which is the most precise among the published data measured by MC-ICPMS and can be comparable to the precision acquired by negative thermal ionization mass spectrometry (N-TIMS) (about 5 ppm). All these results show that our new method provides an efficient way to precisely measure W isotopic compositions of silicate materials. It provides a widely useful tool to reveal the earliest history of the silicate earth and offers the ability to resolve sub-million-year age differences in meteorites.
WOS关键词	IONIZATION MASS-SPECTROMETRY ; EARLY MANTLE DIFFERENTIATION ; METEORITE PARENT BODIES ; EARLY CORE FORMATION ; HF-W CHRONOMETRY ; RATIO DETERMINATIONS ; RAPID ACCRETION ; IRON-METEORITES ; LU-HF ; W-182
WOS研究方向	Chemistry ; Spectroscopy
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000429204700005
资助机构	National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; National Natural Science Foundation of China(41521062 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41490631 ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012) ; 41525012)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/83152]
专题	中国科学院地质与地球物理研究所
通讯作者	Yang, Jin-Hui
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Mei, Qing-Feng,Yang, Jin-Hui,Yang, Yue-Heng. An improved extraction chromatographic purification of tungsten from a silicate matrix for high precision isotopic measurements using MC-ICPMS[J]. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,2018,33(4):569-577.
APA	Mei, Qing-Feng,Yang, Jin-Hui,&Yang, Yue-Heng.(2018).An improved extraction chromatographic purification of tungsten from a silicate matrix for high precision isotopic measurements using MC-ICPMS.JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,33(4),569-577.
MLA	Mei, Qing-Feng,et al."An improved extraction chromatographic purification of tungsten from a silicate matrix for high precision isotopic measurements using MC-ICPMS".JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY 33.4(2018):569-577.