Ion chromatography determination of chloride and sulphate in cement

The contents of chlorine and sulphur species in commercial portland cement were determined by a two-step sample preparation procedure. The first step was carried out by means of sodium carbonate and peroxide fusion, followed by a second step of electrodialytic neutralisation of the resulting solutio n. The chloride and sulphate contents were then determined by ion chromatog raphy. The accuracy of the method was checked by analysing a certified stan dard reference material (SRM). Relative standard deviations were 0.56% and 1.35% for sulphur and chloride determination, respectively. (C) 1999 Elsevi er Science Ltd. All rights reserved.