Be-10 and Cl-36 interlaboratory comparisons


Be-10 and Cl-36 interlaboratory comparisons

Merchel, S.; Bremser, W.; Alfimov, V.; Arnold, M.; Aumaître, G.; Benedetti, L.; Bourlès, D. L.; Braucher, R.; Caffee, M.; Christl, M.; Fifield, L. K.; Finkel, R. C.; Freeman, S. P. H. T.; Ruiz-Gómez, A.; Kubik, P. W.; Rood, D. H.; Sasa, K.; Steier, P.; Tims, S. G.; Wallner, A.; Wilcken, K. M.; Xu, S.

Driven by the progress in AMS and its spreading application within geosciences, measurements of increasing numbers of samples with low isotopic ratios will be required in the future. Therefore, we have examined the linearity of 10Be/9Be as a function of isotope ratio by distributing 3 secondary standards (dilutions of NIST4325: 10-12-10-14) to 9 AMS labs. The problem of low ratio samples is even more crucial for 36Cl mainly due to the high volatility of chlorine. Thus, we have prepared large quantities of 3 36Cl/Cl solutions from a certified 36Cl activity (NIST4943) by dilution with NaCl. AgCl precipitated from these solutions (10-11-10-13) has been distributed to 9 AMS labs. Some measurements are still ongoing. First results from 6 labs for each nuclide show that these interlaboratory exercises are very valuable.

Keywords: accelrator mass spectrometry; AMS; round-robin; standards

  • Lecture (Conference)
    73. Jahrestagung der DPG und DPG Frühjahrstagung der Sektion AMOP (SAMOP), 02.-06.03.2009, Hamburg, Deutschland

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