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 acidic conditions. In order to expand the utility of the laboratory-made aluminium-adsorbing silica gel it was applied as a stationary phase to the ion-exclusion chromatography of various carboxylic acids. Good separations for both aliphatic carboxylic acids and benzenecarboxylic acids with a hydrophobic nature under acidic eluent conditions were achieved in 25 min.
Ohta
K
K
National Industrial Research Institute of Nagoya, Japan. kazuohta@nirin.go.jp
Tanaka
K
K
D000535:Aluminum / Q000737:chemistry; D001565:Benzoates / Q000032:analysis; D002264:Carboxylic Acids / Q000032:analysis*; D002850:Chromatography, Gel / Q000379:methods; D002852:Chromatography, Ion Exchange / Q000379:methods*; D058428:Silica Gel; D012822:Silicon Dioxide / Q000737:chemistry; D014867:Water / Q000737:chemistry
D001565:Benzoates; D002264:Carboxylic Acids; D014867:Water; D058428:Silica Gel; D012822:Silicon Dioxide; D000535:Aluminum; C012018:pyromellitic acid