995
Anal. Chem. 1988, 60, 995-1002
Universal Detection of Ions by Replacement-Ion Chromatography Employing an Anion-Replacement Method and an Ultraviolet-Visible Spectrophotometric Detector Leonard J. Galante and Gary M. Hieftje* Department of Chemistry, Indiana University, Bloomington, Indiana 47405
A new lon-chromatographlc (IC)detection method involving replacement-Ion chromatography (RIC) and an anion-replacement arrangement Is employed for cation and anion analysis. I n the Instrument, a conventional dual-column IC system Is followed by a continuously regenerating anlon-exchange (ionomeric) fiber, which serves as the replacement column. Thls third column converts all ionic solutes Into thelr Iodate or nitrate salts, which are detected sensitively at 215 nm by a UV-visible spectrophotometer. The detection method Is especially useful for cation separations, for which the Influence of various system parameters is discussed In detail. Good precision (
