Dear isotopers, especially sulfur masters,
I am taking a shortcut here instead of digging into literature. Are there work/publications demonstrating
isotopic reproduciblity for routine sulfur form extraction procedure,
i.e. starting from pure sulfur forms (pyrite, pyrrhotite), through HCl, CrCl2 treatment to form Ag2S, or from
elemental sulfur/organic sulfur through organic solvent, HCl, CrCl2 treatment, then check on the isotope consistency between starting and produced materials?
My colleague recently conducted above procedures, got ~95% recovery of the sulfur, and we observed 2 per mil difference between
starting and produced materials, always with the latter heavier. I wonder if it is a unavoidable isotope fractionation associated with this kind of procedure, or there
may be other causes.
Any guidance/suggestions would be greatly appreciated!