The study reported the establishment of an ion chromatography method to determine sodium cyclamate in diet coke by ion chromatography using conductivity detector.The separation was achieved on a Thermo IonPac AG11-HC guard column and a Thermo IonPac AS11-HC analytical column with KOH as the gradient eluent and suppressed conductivity detector.Results showed that sodium cyclamate had good liner relations when the concentration was in the range of 0.112mg/L～112mg/L and the correlation coefficient was above 0.999.The detection limit was 0.05mg/L.The system relative deviation was less than 2%,and the recovery for diet coke was in the range of 98.22%～103.9%.The method is simple,rapid,sensitive,accurate and reproducible.It was suitable for determination of sodium cyclamate in diet coke.
ion chromatographyconductivitydiet cokesodium cyclamate
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