Correction of Loss on Ignition in Slag Powder by ICP-AES

In this work, with reference to the pretreatment method of the relevant national standard, we tested the content of SO 3 in slag powder before and after burning by ICP-AES, then the result of burning loss was corrected by the content of SO 3 . The content of SO 3 which was determined by this new method is fast and accurate, compared with the traditional method. We selected the wavelength of 182.0nm as spectral analysis of SO 3 . The detection limit of the method (3S) was 0.016 mg/L, the recovery rate of the sample was between 97%-104%, and the relative standard deviation (n=6) of the parallel samples was less than 1.05%.