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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
1998-08-01
发表期刊FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
卷号361期号:8页码:767-773
文章类型Article
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标题词Science & Technology ; Physical Sciences
关键词[WOS]ATOMIC WEIGHT
收录类别SCI
语种英语
WOS研究方向Chemistry
WOS类目Chemistry, Analytical
WOS记录号WOS:000075919400004
引用统计
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6009
专题青海盐湖研究所知识仓储
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
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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.
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