Determination of Anions,Cations and Organic Acids in Human Nourishment Solutions by Ion Chromatography

The present paper introduced a method to separate analytes.by ion chromatography columns so as to detect anions,anions and organic acids in human nourishment solutions with suppressed conductivity detector.The separa- tion and determination were obtained by(1)anions and organic acids:IonPac AS23 anion exchange column and KOH gradient eluent generated by ECJC eluent generator together with suppressed conductivity detector;(2)cations:IonPac CS 12A cation exchange column and MSA isocratic eluent together with suppressed conductivity detector.Diluting and injecting liquid samples to IC system,the lowμg/L ions in human nourishment solutions are obtained.The detection limits are from 3.6 to 59.0μg/L.It may calibrate over two orders of magnitude in concentration of 9 ions while the range of linear coefficients from 0.9988 to 0.9999,RSDs are below 4 % for all analytes while the recoveries are between 94.6%～1 03.9 %.The results of analysing actual samples are satisfactory.