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