Use of column-switching technique in photometric ion chromatography.

The effectiveness of column-switching technique in photometric ion chromatography was investigated by use of two columns, into which resins with different specific ion-exchange capacity were packed. A system is consisted of two pumps, a sample injector, two columns, a switching valve, two UV detectors and a dual-pen recorder. As a result, it was found that the column-switching technique possessed the following advantages: (1)rapid and simultaneous determination pf, yarious ions with noticeably different capacity ratios; (2) excellent separation of the peak which can not be resolved by use of a single column; (3) elimination of system peak.