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Ion-exclusion chromatography of carboxylic acids on silica gel modified with aluminium.
The modification of silica gel with aluminium by a coating method was effective for the preparation of a silica-based stationary phase, which acted as a cation exchanger under strongly acidicExpand
Ion chromatographic behavior of alkali and alkaline earth metal cations on silica gel columns with cation exchange characteristics
Ion chromatographic behavior of alkali metal cations and ammonium ion on various unmodified silica gel columns by elution with 2 mM nitric acid (pH 2.7) was investigated. As a result it was foundExpand
Acid-rain monitoring in east Asia with a portable-type ion-exclusion-cation-exchange chromatographic analyzer.
A monitoring system consisting of a portable-type conductimetric ion-exclusion-cation-exchange chromatographic (CEC) analyzer and a meteorological satellite data analyzer has been investigated forExpand
Ion-exclusion chromatographic behavior of aliphatic carboxylic acids and benzenecarboxylic acids on a sulfonated styrene--divinylbenzene co-polymer resin column with sulfuric acid containing various
Heptanol was the most effective modifier in ion-exclusion chromatography for the improvement of peak shapes and a reduction in retention volumes for higher aliphatic carboxylic acids and benzenecarboxy Lic acids. Expand
Ion-exclusion chromatography of benzenecarboxylic acids on an unmodified silica-gel column
In order to demonstrate the effectiveness of two unmodified silica-gel (Develosil 30-5) columns (300×7.8 mm I.D.) used in series for the ion-exclusion chromatographic separation of mono-, di, tri-Expand
Comparison of monomeric and polymeric chiral stationary phases.
Two-type polymeric chiral stationary phases (pCSPs) were prepared by surface grafting of chiral acryl-type monomers on a silica gel surface modified with 3-(trimethoxysilyl)propylmethacrylate. TheExpand
Application of zirconium-modified silica gel as a stationary phase in the ion-exclusion chromatography of carboxylic acids. I. Separation of benzenecarboxylic acids with tartaric acid as eluent and
  • K. Ohta
  • Chemistry, Medicine
  • Journal of chromatography. A
  • 22 June 2001
Zr-Silica adsorbed on 20 mg zirconium g(-1) silica gel was the most suitable stationary phase in the IEC-PD for the simultaneous separation of these benzenecarboxylic acids and phenol. Expand
Simultaneous ion-exclusion chromatography-cation-exchange chromatography with conductimetric detection of anions and cations in acid rain waters
Abstract A simple, selective and sensitive method was investigated for simultaneously determining anions (Cl−, NO3−, SO42−) and cations (Na+, NH4+, K+, Mg2+, Ca2+) in acid rain and relatedExpand
Ion-exclusion chromatography of aliphatic carboxylic acids on an unmodified silica gel column
In order to demonstrate the effectiveness of a silica gel column in ion-exclusion chromatography, the elution behavior of aliphatic carboxylic acids was investigated on an unmodified silica gelExpand
Ion-exclusion chromatography with conductimetric detection of aliphatic carboxylic acids on an H+-form cation-exchange resin column by elution with polyols and sugars
Abstract The Ion-exclusion chromatography (IEC) of normal aliphatic carboxylic acids of different acidity (p K a ) and hydrophobicity was investigated on a poly(styrene-divinylbenzene) (PS-DVB)-basedExpand