热电离质谱法测定岩石标准物质中Sr同位素组成OA
Determination of Sr Isotopic Composition of Rock Standards by Thermal Ionisation Mass Spectrometry
利用Triton XT型热电离质谱仪,对1个碳酸锶同位素标准物质SRM 987和4个岩石标准物质BCR-2、BHVO-2、JLs-1和GBW07127进行了锶(Sr)同位素比值的测试,测试时采用指数律和88Sr/86Sr=8.375209进行质量分馏校正,87Rb/85Rb=0.385 041进行同质异位素干扰扣除.测得SRM 987:87 Sr/86 Sr比值为0.710252±0.000011(n=40,2SD),BCR-2:87Sr/86Sr 比值为 0.705016±0.000011(n=10,2SD)、BHVO-2:87Sr/86Sr 比值为0.703471±0.000011(n=10,2SD),JLs-1:87Sr/86Sr 比值为:0.707825±0.000014(w=10,2SD),与推荐值及前人文献报道值在误差范围内一致.此外,本研究测定的碳酸盐岩标准物质GBW07127的87Sr/86Sr比值为0.708971±0.000023(n=20,2SD),这一数据丰富了目前国家标准物质的锶同位素数据库,可为地球化学的分析研究提供重要的数据参照.
The strontium isotope ratios for a carbonated strontium isotope standard SRM 987 and four rock samples BCR-2,BHVO-2,JLs-1,and GBW07127 have been determined by using the Triton XT thermal ionisation mass spectrome-ter provided by the Shandong Institute of Geological Sciences.To correct for mass fractionation,an exponential law with 88Sr/86Sr=8.375209 has been employed,while 87Rb/85Rb=0.385041 has been used to correct for isobaric interference.The obtained 87Sr/86Sr ratios for SRM 987,BCR-2,BHVO-2,and JLs-1 are 0.710252±0.000011(n=40,2SD),0.705016±0.000011(n=10,2SD),0.703471±0.000011(n=10,2SD),and 0.707825±0.000014(n=10,2SD),respec-tively.the results are consistent with the recommended values and the previously published literature.inthis study,we re-port the 87Sr/86Sr ratio of carbonatite standard GBW07127,which results in 0.708971+0.000023(n=20,2SD).This data enriches the current strontium isotope library of the national standard material,and it can provideimportant data references for the analytical study of geochemistry.
徐珺;王秀凤;周长祥;程伟;迟乃杰;张晨西;李增胜;舒磊;单伟;李敏;孙雨沁
自然资源部金矿成矿过程与资源利用重点实验室,山东省金属矿产成矿地质过程与资源利用重点实验室,山东省地质科学研究院,山东 济南 250013
化学
热电离质谱仪锶同位素岩石标准物质质谱分析
Thermal ionization mass spectrometrystrontium isotopesrock reference samplesmass spectrometric analysis
《山东国土资源》 2024 (006)
28-35 / 8
国家自然科学基金(42272104);中国地质调查局中国矿产地质志项目(DD20221695);山东省地质勘查项目(鲁勘字[2022]12号);山东省自然科学基金(ZR2019PD019);山东省自然科学基金青年项目(编号ZR2022QD050);山东省地质科学研究院开放课题资助项目(Kfjjdky202120)
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