Sulfur isotopic analysis
This protocol is extracted from research article:
Strong local, not global, controls on marine pyrite sulfur isotopes
Sci Adv, Feb 26, 2021; DOI: 10.1126/sciadv.abb7403

For analysis, 450 μg of Ag2S was loaded into tin capsules with excess V2O5. The 34S/32S ratio was measured on a Thermo Fisher Scientific Delta V Plus, following inline combustion in a Costech ECS 4010 elemental analyzer at Washington University in St. Louis. CRS sulfur isotope compositions are expressed in standard delta notation as per mil (‰) deviations from the VCDT standard, with an analytical error of <0.5‰.

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