AU153: Fast Determinations of Phosphate and Citrate in Carbonated Beverages

Instrument Type: IC

Phosphoric and citric acids are critical additives to colas for flavor and preservation. However carbon dioxide, added for flavor and as a preservative, interferes with accurate determinations of phosphate and citrate. In this method, carbon dioxide gas as carbonate is removed by the CRD device as the sample is introduced by the autosampler. Citrate and phosphate were separated on IonPac Fast Anion III column optimized for fast 5 min separations. Refer to AN169 for more information on fast citrate and phosphate analysis.