Sulfur reduction distillation of sulfides and verification of the effect of sulfur isotopic fractionation during pretreatment

Abstract Toxic gases can be emitted when sulfides form compounds with heavy metals; thus, a series of pretreatments are required prior to the analysis sulfur isotope ratios remove unnecessary elements. In addition, it is necessary verify effect fractionation caused by plurality comprising different sulfide species during pretreatment process. this study, H 2 S (gas) was extracted from mixed pyrite and galena reacted acids (i.e., HCl + HI 3 PO ) at 200 °C, in sealed conditions filled N . Subsequently, CdS (s) precipitated reaction trap Cd(CH COO) 2(aq) then ionized SO 4 2− (aq) after reacting O 2(l) , followed addition BaCl precipitate BaSO 4(s) The values products (barite: av. 5.9‰) were lower than those reactants (sulfides: 6.9‰); attributed preferential low ratio converting Therefore, process for sample composed mixture, between should considered.