【引用本文】 唐索寒, 李津, 潘辰旭, 等. 岩石铷-锶和钐-钕同位素标准物质的研制[J]. 岩矿测试, 2021, 40(2): 285-295. doi: 10.15898/j.cnki.11-2131/td.202011110140
TANG Suo-han , LI Jin , PAN Chen-xu , et al. Production and Certification of the Reference Material GBW04139, GBW04140 and GBW04141 as Rb-Sr and Sm-Nd Isotope Analysis References[J]. Rock and Mineral Analysis, 2021, 40(2): 285-295. doi: 10.15898/j.cnki.11-2131/td.202011110140

岩石铷-锶和钐-钕同位素标准物质的研制

中国地质科学院地质研究所, 自然资源部同位素地质重点实验室, 北京 100037

收稿日期: 2020-11-11  修回日期: 2021-01-29 

基金项目: 国土资源公益性行业科研专项经费项目(201511064)

作者简介: 唐索寒,研究员,主要研究方向为同位素地球化学。E-mail:tangsuohan@163.com。

Production and Certification of the Reference Material GBW04139, GBW04140 and GBW04141 as Rb-Sr and Sm-Nd Isotope Analysis References

Laboratory of Isotope Geology, Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China

Received Date: 2020-11-11
Revised Date: 2021-01-29

摘要:通常样品的87Sr/86Sr和143Nd/144Nd同位素比值分析采用SRM987、JNdi-1作为标准物质,它们分别是纯的碳酸盐和氧化物,适用于监控质谱测试过程。中国现有的钐-钕地质和铷-锶年龄标准物质,分别为玄武岩和钾长石,它们与很多地质样品的基质存在差别。仅有这两种基质的标准物质不能有效地监控不同地质样品Rb-Sr、Sm-Nd同位素分析过程,因此研制不同岩性的Rb-Sr、Sm-Nd同位素标准物质具有重要现实意义。本文采集中国典型地区的橄榄岩、榴辉岩和花岗岩作为候选物,严格按照《一级标准物质技术规范》(JJF 1006-1994)和《标准物质定值的通用原则及统计学原理》(JJF 1343-2012)等相关标准物质国家计量技术规范和国家标准,研制了橄榄岩、榴辉岩和花岗岩铷-锶、钐-钕同位素标准物质(编号为GBW04139、GBW04140、GBW04141),其中橄榄岩标准物质适用于高 Mg、Fe,低Rb、Nd含量样品的分析,榴辉岩和花岗岩标准物质适用于含有难溶副矿物的岩石样品的分析。每个标准物质具有6个特性量值,Rb、Sr、Sm和Nd含量分布分别为0.16~64μg/g、12~560μg/g、0.1~3.2μg/g和0.3~15.3μg/g,87Sr/86Sr比值分布为0.70446~0.71309,143Nd/144Nd比值分布为0.51115~0.51267,同位素比值精度达到或优于同类标准物质。这些特性量值更接近实际样品,使用时将更加有效和方便。该系列标准物质可用于校准仪器和评价方法,并能有效监控实验室此类样品的铷-锶、钐-钕同位素分析过程。

关键词: 岩石标准物质, 铷-锶同位素, 钐-钕同位素, 均匀性, 稳定性, 认定值

Production and Certification of the Reference Material GBW04139, GBW04140 and GBW04141 as Rb-Sr and Sm-Nd Isotope Analysis References

KEY WORDS: certified reference materials, Rb-Sr isotope, Sm-Nd isotope, homogeneity, stability, certified values

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岩石铷-锶和钐-钕同位素标准物质的研制

唐索寒, 李津, 潘辰旭, 刘辉, 闫斌