6533b834fe1ef96bd129df98

RESEARCH PRODUCT

Sulfur isotope ratio measurements of individual sulfate particles by NanoSIMS

Meinrat O. AndreaeStephen F. FoleyBaerbel WinterhollerPeter Hoppe

subject

ThenarditeMicroprobeAnhydriteIon beamMagnesiumEpsomiteAnalytical chemistrychemistry.chemical_elementCondensed Matter PhysicsSulfurchemistry.chemical_compoundchemistryPhysical and Theoretical ChemistrySulfateInstrumentationSpectroscopy

description

Abstract The sulfur isotopic compositions of barite (BaSO4), anhydrite (CaSO4), gypsum (CaSO4·2H2O), mascagnite ((NH4)2SO4), thenardite (Na2SO4), boetite (K2SO4), epsomite (MgSO4·7H2O), magnesium sulfate (MgSO4·xH2O) and cysteine (an amino acid) were determined with a Cameca NanoSIMS 50 ion microprobe employing a Cs+ primary ion beam and measuring negative secondary ions. This ion microprobe permits the analysis of sulfur isotope ratios in sulfates on 0.001–0.5 ng of sample material, enabling the analysis of individual S-bearing particles with diameters as small as 500 nm. The grain-to-grain reproducibility of measurements is typically 5‰ (1σ) for micron-sized grains,

yearjournalcountryeditionlanguage
2008-04-01International Journal of Mass Spectrometry
https://doi.org/10.1016/j.ijms.2008.01.003