Effects of different cone combinations on accurate and precise determination of Li isotopic composition by MC-ICP-MS

doi:10.1016/j.sab.2018.04.015

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	Effects of different cone combinations on accurate and precise determination of Li isotopic composition by MC-ICP-MS
	Gou, Long-Fei 1,2; Jin, Zhang-Dong 1,3; Deng, Li 1; He, Mao-Yong 1; Liu, Chun-Yao 1,2
通讯作者	Jin, Zhang-Dong(zhdjin@ieecas.cn)
	2018-08-01
发表期刊	SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
ISSN	0584-8547
卷号	146 页码:1-8
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 Li-7 (and Li-6) 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. (C) 2018 Elsevier B.V. All rights reserved.
关键词	Lithium isotopes Cone combination Mass bias MC-ICP-MS
DOI	10.1016/j.sab.2018.04.015
关键词[WOS]	PLASMA-MASS SPECTROMETRY ; GEOLOGICAL-MATERIALS ; RATIO ANALYSIS ; LITHIUM ; FRACTIONATION ; SYSTEMATICS ; CONSTRAINTS ; SAMPLES ; MANTLE ; BORON
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41773149]
WOS研究方向	Spectroscopy
项目资助者	National Natural Science Foundation of China
WOS类目	Spectroscopy
WOS记录号	WOS:000439675300001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/13241
专题	加速器质谱中心
通讯作者	Jin, Zhang-Dong
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 3.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Gou, Long-Fei,Jin, Zhang-Dong,Deng, Li,et al. Effects of different cone combinations on accurate and precise determination of Li isotopic composition by MC-ICP-MS[J]. SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY,2018,146:1-8.
APA	Gou, Long-Fei,Jin, Zhang-Dong,Deng, Li,He, Mao-Yong,&Liu, Chun-Yao.(2018).Effects of different cone combinations on accurate and precise determination of Li isotopic composition by MC-ICP-MS.SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY,146,1-8.
MLA	Gou, Long-Fei,et al."Effects of different cone combinations on accurate and precise determination of Li isotopic composition by MC-ICP-MS".SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY 146(2018):1-8.