Initial results from isotope dilution for Cl and 36Cl measurements at the PSI/ETH Zurich AMS facility

• DOI: 10.1016/j.nimb.2004.04.115
• Publication Date: 2004-05-29T11:07:21Z
• Authors: Susan Ivy-Ochs; Hans-Arno Synal; Christine Roth; Mirjam Schaller
• Keywords: Isotope dilution; Rockslide; Dilution; Replicate

The first results of our use of isotope dilution for determining total Cl and 36Cl in the same rock sample material are presented here. Tests with a dilution series of hypothetical rock Cl concentrations between 5 and 200 ppm verified that our accelerator set-up is appropriate for the low-energy side 37Cl/35Cl measurements. Results from limestone and dolomite samples from the Flims rockslide (Switzerland) indicate the extraction methods described here yield highly reproducible total Cl and 36Cl concentrations with excellent precision to very low values. Replicate measurements suggest that the rocks we are analyzing from the Flims rockslide are closed to uptake or loss of the isotopes of Cl.