Accession Number : ADA191326
Title : Universal Detection of Ions by Replacement-Ion Chromatography Employing an Anion-Replacement Method and an Ultraviolet-Visible Spectrophotometric Detector.
Descriptive Note : Technical rept.,
Corporate Author : INDIANA UNIV AT BLOOMINGTON DEPT OF CHEMISTRY
Personal Author(s) : Galante, Leonard J ; Hieftie, Gary M
PDF Url : ADA191326
Report Date : 22 Feb 1988
Pagination or Media Count : 42
Abstract : A new ion-chromatographic (IC) detection method involving replacement-ion chromatography (RIC) and an anion-replacement arrangement is employed for cation and anion analysis. In the instrument, a conventional dual-column IC system is followed by a continuously regenerated anion-exchange (ionomeric) fiber, which serves as the replacement column. This third column converts all ionic solutes into their iodate or nitrate salts, which are detected sensitively at 215 nm by a UV-visible spectrophotometer. This detection method is especially useful for cation separation, for which the influence of various system parameters are discussed in detail. Good precision (RSD5%), low detection limits (1-15 ng), and universal calibration were achieved for several monovalent cations. However, the method does not appear to be useful for anion determinations. Keywords: Ion chromatography; Replacement ion chromatography; Chromatographic detectors.
Descriptors : *ANIONS, *CATIONS, *CHROMATOGRAPHS, *DETECTORS, *IONS, CHROMATOGRAPHY, DETECTION, LIMITATIONS, NITRATES, PARAMETERS, REPLACEMENT, SALTS, SEPARATION, VALENCE
Subject Categories : Physical Chemistry
Test Facilities, Equipment and Methods
Distribution Statement : APPROVED FOR PUBLIC RELEASE