Chromatographic determination of anions in industrial salt and sodium chloride brines used in chlor–alkali industry

An ion chromatographic method using an ion-exchange column for the simultaneous analysis of sulphate and chlorate in industrial salt and sodium chloride brines has been developed. A mixed eluent of 2.0 mM sodium carbonate and 0.75 mM sodium bicarbonate is used. The effects of various parameters have been reported and critically discussed. The results are precise and afford simultaneous determinations of sulphate and chlorate.