Spectrophotometric Determination of Titanium Carbide in Carbide Slag

Sample of carbide slag was dissolved with H2SO4 and HF to separate titanium carbide phase from other titanium phases, then the titanium carbide was decomposed with HNO3. Using H2O2 as chromogenic agent, the Ti(Ⅳ) obtained in the sample solution was determined by spectrophotometry, and the amount of titanium found was converted into content of titanium carbide in the sample. To test precision of the proposed method, content of TiC in a slag sample was determined 8 times in parallel, giving value of RSD of 1.1%. Test for recovery was made by addition of primary standard of TiC at 3 different mass values and values of recovery were calculated from the analytical results obtained which were found in the range of 97.4%-101%.