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

摘要

This paper describes a rapid, accurate method for the determination of the content of SO3 in slag powder before and after burning, with reference to the pretreatment method of the relevant national standard. We tested the content of SO3 in slag powder before and after burning by inductively coupled plasma-optical emission spectrometry (ICP-AES), then the result of burning loss was corrected by the content of SO_3. The content of SO3 which was determined by this new method is fast and accurate, compared with the traditional method. We selected the wavelength of 182.0 nm as spectral analysis of SO_3. The detection limit of the method (3S) was 0.016 mg/L. Test for recovery was performed by standard addition method, giving values of recovery in the ranges of 97%-104%. And the relative standard deviation (n=6) of the parallel samples was less than 1.05%.