Ion-chromatographic behavior of alkali metal cations and ammonium ion on zirconium-adsorbing silica gel.
The preparation and evaluation of zirconium-adsorbing silica gel (Zr-Silica) as an ion-exchange stationary phase in ion chromatography for inorganic anions and cations was carried out. The Zr-Silica was prepared by the reaction of silanol groups on the surface of the silica gel with zirconium butoxide (Zr(OCH2CH2CH2CH3)4) in ethanol. The ion-exchange characteristics of the Zr-Silica were evaluated using 10 mM tartaric acid at pH 2.5 as eluent. The Zr-Silica was found to act as a cation-exchanger under the eluent conditions. The retention behavior of alkali and alkaline earth metal cations was then investigated. The Zr-Silica column was proved to be suitable for the simultaneous separation of alkali metal cations and ammonium ion. Excellent separation of the cations on a 15 cm Zr-Silica column was achieved in 25 min using 10 mM tartaric acid as eluent.
National Industrial Research Institute of Nagoya, Japan. kazuohta@nirin.go.jp
K
K
Ohta
H
H
Morikawa
K
K
Tanaka
Y
Y
Uwamino
M
M
Furukawa
M
M
Sando
D000468:Alkalies / Q000737:chemistry; D002412:Cations; D002852:Chromatography, Ion Exchange / Q000379:methods*; D008670:Metals / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D058428:Silica Gel; D012822:Silicon Dioxide / Q000737:chemistry*; D014867:Water / Q000737:chemistry
D000468:Alkalies; D002412:Cations; D008670:Metals; D000644:Quaternary Ammonium Compounds; D014867:Water; D058428:Silica Gel; D012822:Silicon Dioxide