Prepared Different Kind of Management Sample with Mn₃O₄ Adding Sulphuric Acid

Different sulfur content mixtures of Mn₃O₄, MnO₂, MnSO₄ was prepared by adding known concentration sulfur acid to Mn₃O₄. The prepared mixtures was analysed with high-frequency infrared carbon-sulfur. The tested data indicate that the percentages of sulfur in those mixtures are in line with the true. XRD analysis result shows that because MnSO₄ contains crystallization water, the data of sulfur tested by high-frequency infrared carbon-sulfur are equal to the really value.