Separation and determination of sulfur with different valance in polysulfide mixture

Abstract

A new process of separating sulfur with different valance from polysulfide mixtures was developed. Sulfide, sulfite and sulfur were separated by adding acetic acid in one step. The polysulfide mixture, sulfite solution and sulfur were oxidized to sulfate by hydrogen peroxide. The products were measured by X-ray Fluorescence Spectrometer(XRF) using filter method preparative specimen. The measurement needs only one set of standard sample. The effects of temperature and pH values on the separation were discussed. The results show that the recoveries range from 98.0% to 101.3% of sulfidic sulfur S(-II), 97.0% to 103.0% for sulfite S(IV) and 98.4% to 100.4% for polysulfidic sulfur S(0).

Keywords

polysulfide / separation / determination / X-ray fluorescence spectrum / valance