An efficient Li dual-column system and high-precision Li isotope measurement of high matrix and low-Li samples by MC-ICP-MS

doi:10.1039/d3ja00054k

NIGPAS OpenIR

	An efficient Li dual-column system and high-precision Li isotope measurement of high matrix and low-Li samples by MC-ICP-MS
通讯作者	Cao, Cheng(hekouapple@gmail.com)
	Cao, Cheng 1,2; Li, Tao 3; Chen, Tianyu 1,2; Li, Gaojun 1,2; Li, Wei 1,2; Chen, Jun 1,2
	2023-06-12
发表期刊	JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
ISSN	0267-9477
页码	9
摘要	Over the last decade, there has been a growing interest in using lithium (Li) isotopes in marine carbonates to trace chemical weathering and clay formation in the Earth's history. Yet it remains technically challenging to precisely and efficiently determine the Li isotope composition in carbonate samples due to the imperfect Li separation led by the matrix effect and the extremely low Li concentration in carbonates relative to the analytical threshold of sample size. For such high matrix and low-Li samples, here we present an efficient dual-column chromatography system for Li purification. The dual-column system has a large loading capacity, fixed Li elution range of merely 12 mL, complete Li recovery (>99.5%) and relatively efficient total elution time (7 hours). The procedural blank is 0.036 & PLUSMN; 0.002 ng accounting for sample dissolution and chemical purification, and the Na/Li mass ratio of the Li cut is below 0.5. High precision and accurate Li isotope measurement is performed efficiently with a small sample-sized protocol developed on a MC-ICP-MS (Neptune plus) connected with an APEX 2-IR desolvator. The whole procedure is validated by analyzing a series of certified reference materials. The long-term external precision of & delta;Li-7 determined based on L-SVEC and a high-purity Li solution is 0.6 & PTSTHOUSND; (2SD) and 0.9 & PTSTHOUSND; (2SD) for a minimum sample size of 7.5 ng.
DOI	10.1039/d3ja00054k
收录类别	SCI
语种	英语
关键词[WOS]	UPPER OCEANIC-CRUST ; LITHIUM ISOTOPES ; GEOLOGICAL-MATERIALS ; MASS-SPECTROMETRY ; DELTA-LI-7 VALUES ; ACCURATE ; SEAWATER ; ROCK ; FRACTIONATION ; CARBONATES
资助项目	NSFC[41993121] ; NSFC[42203003]
WOS研究方向	Chemistry ; Spectroscopy
WOS类目	Chemistry, Analytical ; Spectroscopy
WOS记录号	WOS:001022044500001
项目资助者	NSFC
出版者	ROYAL SOC CHEMISTRY
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/42465
专题	中国科学院南京地质古生物研究所
通讯作者	Cao, Cheng
作者单位	1.Nanjing Univ, Sch Earth Sci & Engn, Key Lab Surficial Geochem, MOE, Nanjing 210023, Peoples R China 2.Nanjing Univ, Frontiers Sci Ctr Crit Earth Mat Cycling, Nanjing 210023, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Cao, Cheng,Li, Tao,Chen, Tianyu,et al. An efficient Li dual-column system and high-precision Li isotope measurement of high matrix and low-Li samples by MC-ICP-MS[J]. JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,2023:9.
APA	Cao, Cheng,Li, Tao,Chen, Tianyu,Li, Gaojun,Li, Wei,&Chen, Jun.(2023).An efficient Li dual-column system and high-precision Li isotope measurement of high matrix and low-Li samples by MC-ICP-MS.JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY,9.
MLA	Cao, Cheng,et al."An efficient Li dual-column system and high-precision Li isotope measurement of high matrix and low-Li samples by MC-ICP-MS".JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY (2023):9.