Sulphur extraction method using Kiba reagent for determination of sulphur-34 isotope

Sn2+ in strong H3PO4 (to be called KIBA reagent) is a powerful reducing reagent of sulphate to hydrogen sulphide. This method can be applied for quantitative analysis and determine sulphur-34 isotope from sulphur-bearing materials, either organic or anorganic. In this experiment, sulphide rocks as pyrit and pyrrhotite from were taken from West Kalimantan, sulphate rock as allunite was taken Cugung Rajabasa-Lampung, Papandayan-West Java. From sulfur concentration data as a reference analyzed X ray fluorescence spectrometer and data of first temperature which H2S gas evoluted show that Kiba reagent is most effective and faster for sulphur extraction from sulfide rocks pyrit and pyrrhotite if compared with sulfate rocks and elemental sulfur rocks. The δ 34S value for pyrit and pyrrhotite were found to be -4.619 0/00 CDT and 8.165 0/00 CDT, respectively. Allunite had δ 34S value of 3.7 0/00 CDT, and gypsum had δ 34S value 8.898 0/00 CDT. Element sulphur from Papandayan had δ 34S value of -0.745 0/00 CDT, and elemental sulphur from Cugung Rajabasa had δ 34S value of -2.945 0/00 CDT. (authors)