Precise Determination of Rubidium in Geological Reference Materials by ID‐TIMS and WD‐XRF: A Discussion for the Basalt BIR‐1

Abstract

Data were obtained for rubidium in six geological reference materials by isotopic dilution thermal ionisation mass spectrometry (ID‐TIMS) and wavelength dispersive X‐ray fluorescence spectrometry (WD‐XRF). The results found by one technique compare very well with the other within the respective analytical uncertainties and are also in good agreement with data from previously published values. The particular case of low Rb determinations in reference sample BIR‐1 is discussed.

Determination of Cr, Cu, Ni, Sn, Sr and Zn Mass Fractions in Geochemical Reference Materials by Isotope Dilution ICP‐MS

“…The mean of results for Sr in BIR‐1, 109.2 ± 0.8 mg kg −1 also agreed with data sets obtained by Willbold and Jochum (2005), 109 ± 1.4 mg kg −1 , using ID‐SF‐ICP‐MS, Bollinger and Etoubleau (2001), 108.8 ± 1.1 mg kg −1 , and Pearce et al. (2007), 110 ± 1.3 mg kg −1 , obtained by ID‐TIMS.…”

“…The mean results for Sr in AGV-1 and GSP-2 (Table 4), respectively, 661 ± 4 and 236 ± 2 mg kg -1 , agreed within uncertainties with the values obtained by Raczek et al (2001), 660 ± 1 and 238.0 ± 0.2 mg kg -1 , respectively, using ID-TIMS. The mean of results for Sr in BIR-1, 109.2 ± 0.8 mg kg -1 also agreed with data sets obtained by Willbold and Jochum (2005), 109 ± 1.4 mg kg -1 , using ID-SF-ICP-MS, Bollinger and Etoubleau (2001), 108.8 ± 1.1 mg kg -1 , and Pearce et al (2007), 110 ± 1.3 mg kg -1 , obtained by ID-TIMS.…”