ABSTRACT:
We present a new set of reference materials, the ND70-series, for in situ measurement of volatile elements (H2 O, CO2 , S, Cl, F) in silicate glass of basaltic composition. The materials were synthesised in piston cylinders at pressures of 1 to 1.5 GPa under volatileundersaturated conditions. They span mass fractions from 0 to 6% m/m H2 O, from 0 to 1.6% m/m CO 2 and from 0 to 1% m/m S, Cl and F. The materials were characterised by elastic recoil detection analysis for H2 O, by nuclear reaction analysis for CO2 , by elemental analyser for CO2 , by Fourier transform infrared spectroscopy for H2 O and CO2 , by secondary ion mass spectrometry for H2 O, CO2 , S, Cl and F, and by electron probe microanalysis for CO2 , S, Cl and major elements. Comparison between expected and measured volatile amounts across techniques and institutions is excellent. It was found however that SIMS measurements of CO 2 mass fractions using either Cs + or O − primary beams are strongly a×ected by the glass H2 O content. Reference materials have been made available to users at ion probe facilities in the US, Europe and Japan. Remaining reference materials are preserved at the Smithsonian National Museum of Natural History where they are freely available on loan to any researcher.
