日本岩石标准样品的^(87)Sr/^(86)Sr比值和铷、锶含量的测定  

Determinations of ^(87)Sr/^(86)Sr Ratio and Rb,Sr Contents on the GSJ Rock Reference Samples

作　　者：张自超[1] ZHANG Zichao(Yichang Institute of Geology and Mineral Resources)

机构地区：[1]宜昌地质矿产研究所

出　　处：《岩矿测试》1988年第4期297-300,共4页Rock and Mineral Analysis

摘　　要：本文报导了对12个日本“火成岩系列”岩石标准样品的^(87)Sr/^(86)Sr比值和Rb、Sr含量的测定结果。Rb、Sr含量采用同位素稀释法测定,^(87)Sr/^(86)Sr比值单独取样经分离后由质谱计直接测量。对NBS-987和NBS-607标准样品^(87)Sr/^(86)Sr单次测定的分析精度和重复分析的再现性均好于0.03%,NBS-607中Rb、Sr含量测定结果与证书值的最大偏差小于0.6%。直接测定日本“火成岩系列”岩石标样的^(87)Sr/^(86)Sr,与同位素稀释法测定的结果吻合,用不同浓度的稀释剂在不同仪器上测定的Rb、Sr含量在实验误差范围内一致,表明测定的结果可靠。This paper reports the measurements of^(87)Sr/^(86)Sr ratio and Rb、Sr contents on 12 GSJ’Igneous Rock Series’rock reference samples.The chemical separations were carried out in a clean laboratory.Rb and Sr contents were determined by isotope dilution with enriched 85Rb and 84Sr spikes^(87)Sr/^(86)Sr ratios were directly measured in a separate sample aliquot after chemical separation.All the isotope ratio measurements were undertaken on a MAT-261 mass spectrometer.NBS 987 and 607 were used for monitoring the analytical process and instrument conditions.The precision and reproducibility for the^(87)Sr/^(86)Sr measurements on the NBS standards are better than 0.03%while the uncertainty for Rb and Sr contents of NBS 607 are less than 0.6%.All show that the measured data of the GSJ standard samples are reliable.

关 键 词：同位素稀释法 标准样品 实验误差 分析精度 质谱计 最大偏差 NBS 直接测量 

分 类 号：R28[医药卫生—中药学]