Preparation and characterisation of synthetic mixtures of lithium isotopes

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	Preparation and characterisation of synthetic mixtures of lithium isotopes
	Qi, HP ; Berglund, M ; Taylor, PDP ; Hendrickx, F ; Verbruggen, A ; De Bievre, P
刊名	FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
	1998-08-01
卷号	361 期号:8 页码:767-773
文献子类	Article
英文摘要	Re-certification of the absolute isotopic com position of the natural lithium isotopic reference material (IRM), IRMM-016, requires measurements calibrated by means of synthetic mixtures of highly enriched lithium isotopes. Ten such mixtures were prepared by weighing and mixing of two well characterised, isotopically enriched, Li2CO3 compounds. The starting materials, 99.9981% enriched Li-6, and 99.9937% enriched Li-7, were purified by ion exchange, and the purified materials converted from LiOH to Li2CO3 by reaction with CO2. Ten new mixtures were prepared by mixing different weighed amounts of these dissolved Li2CO3 carrier compounds. The compounds had an estimated level of impurities of 100 +/- 100 mu g.g(-1) (expanded uncertainty with a coverage factor of 2). In the ten mixtures, the n(Li-6)/n(Li-7) ratio varies from 0.025 to 14 and the achieved expanded relative uncertainty on the amount ratio prepared is typically 2.10(-4). These mixtures were then used to determine the correction factor, K, for mass discrimination of the measurement procedure and instrument concerned.
WOS关键词	ATOMIC WEIGHT
WOS研究方向	Chemistry
语种	英语
WOS记录号	WOS:000075919400004
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/6009]
专题	青海盐湖研究所_青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Commiss European Communities, Joint Res Ctr, Inst Reference Mat & Measurements, B-2440 Geel, Belgium 2.Acad Sinica, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Qi, HP,Berglund, M,Taylor, PDP,et al. Preparation and characterisation of synthetic mixtures of lithium isotopes[J]. FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY,1998,361(8):767-773.
APA	Qi, HP,Berglund, M,Taylor, PDP,Hendrickx, F,Verbruggen, A,&De Bievre, P.(1998).Preparation and characterisation of synthetic mixtures of lithium isotopes.FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY,361(8),767-773.
MLA	Qi, HP,et al."Preparation and characterisation of synthetic mixtures of lithium isotopes".FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY 361.8(1998):767-773.