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In our study, an ion chromatographic cycling-column-switching system was developed forthe analysis of trace anions in complex matrices, such as sodium chloride electrolyte and seawater.The simplified on-line matrix elimination technique coupled with IC was developed with only one pump, a six-port valve, a ten-port valve, an IonPac AG19 guard column and an IonPac AS 19 separation column as analytical columns, an IonPac AG16 guard column as concentrator column and a suppressor made in China.