Determination of aspartame by ion chromatography with electrochemical integrated amperometric detection

In this paper, the separation and determination of the sweetener aspartame by ion chromatography coupled with electrochemical amperometric detection i s reported. Sodium saccharin, acesulfame-K and aspartame were separated usi ng 27.5 mmol/l NaOH isocratic elution on a Dionex IonPac AS4A-SC separation column. Aspartame can be determined by integrated amperometric detection w ithout interference from the other two sweeteners; The method can be applie d to the determination of aspartame in powered tabletop, fruit juice and ca rbonated beverage samples, and the results obtained by integrated amperomet ry were in agreement with those obtained using a UV detection method. A met hod for determining analytes with an NH2 group by ion chromatography with i ntegrated amperometry was developed. (C) 1999 Elsevier Science B.V. All rig hts reserved.