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- Sulfur delta34S (CDT)
- Material:
- sulfide minerals
- sulfate minerals
- aqueous sulfur species (H2S, bisulfide, thio/polysulfides,
sulfates, etc.)
- organic sulfur
- native sulfur
- aerosol (atmospheric) sulfate
- gases (SO2, H2S, DMS: dimethyl sulfide,
MSA: methyl sulfonic acid)
- soluble sulfates/evaporites in mine drainage
- precipitation sulfate (acid rain)
- Form:
- extract and process to sulfur dioxide, analyze as SO2
on mass spectrometer (as SF6 to avoid oxygen isotope
correction and for 36S measurements)
- Typically ± 0.04 to 0.1 per mil
- Temperature, kinetics, sources and tracers, reaction pathways
- Finnigan 252, VG Optima, Nuclide 6-60
- extraction lines, CO2 and Nd: YAG laser microbeam
sampling, auto trappings/gas separation, fluorination line using
F2 and BrF5 reagents to generate SF6,
VG multi-element analyzer
- Yes - VG multi-element analyzer (~100/day)
- Sample Size:
- minimum: 1 nanomole as SO2 extracted from
sample
- typical: 20-60 micromole as SO2
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