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Simultaneous separation of common mono- and divalent cations on silica gels modified with aluminium and zirconium
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Abstract
The modification of silica gel with aluminium and zirconium can be used for the preparation of advanced silica-based cation-exchange stationary phases for use in ion chromatography with conductimetric detection (IC-CD) for cations. Silica gels modified with aluminium (Al-silica) and zirconium (Zr-silica) act as cation-exchangers under strongly acidic conditions. Highly sensitive indirect conductimetric detection and excellently simultaneous separation for common mono- and divalent cations (Li+, Na+, NH4+, K+, Mg2+ and Ca2+) can be achieved on the Al-silica and Zr-silica columns in IC-CD by using acidic eluents containing 15-crown-5 (1,3,7,10,13-pentaoxacyclopentadecane). The Al-silica and Zr-silica can also be applied successfully as cation-exchange stationary phases in ion-exclusion chromatography for the separation of various aliphatic and benzenecarboxylic acids.
Item Type: | Article |
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Authors/Creators: | Ohta, K and Tanaka, K and Haddad, PR |
Keywords: | Silica; Aluminium; Zirconium; Cation-exchange chromatography; Ion-exclusion chromatography |
Journal or Publication Title: | TrAC - Trends in Analytical Chemistry |
ISSN: | 0167-2940 |
DOI / ID Number: | 10.1016/S0165-9936(01)00074-7 |
Additional Information: | The definitive version is available online at http://www.sciencedirect.com/ |
Item Statistics: | View statistics for this item |
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