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.

Report Date:

1988-02-22

Pagination or Media Count:

42.0

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