Modification for the matrix effect in SIMS-derived water contents of silicate glasses

Analyses of elemental abundances by secondary ion mass spectrometry (SIMS) require matrix-matched standard samples to account for the matrix effect on correction factors. This requirement makes it difficult obtain accurate results geological variable chemistry. In this study, we prepared 39 volcanic glasses foiditic, basaltic, basaltic andesitic, rhyolitic and pure SiO2 compositions, including synthetic natural collected from deep seafloor. The measured H2O contents these were in range 0.02–4.8 wt%. We showed that calibration curves (H2O content vs. 16OH−/30Si−SIMS ratio) differed according composition glasses. Our demonstrated a particular 16OH/30SiSIMS ratio, water could differ up factor five, depending glass. Although (the slope curve [H2O/(16OH−/30Si−)SIMS]) was weakly correlated with content, identified stronger correlation molar weight (g mol−1, one-oxygen mole basis) silicate suggest modification SIMS-based their weights provides more glasses, regardless chemical without need series known contents.