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Non-suppressed ion chromatography of cations on silica gel modified with aluminium

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Ohta, K, Morikawa, H, Tanaka, K and Haddad, PR 1998 , 'Non-suppressed ion chromatography of cations on silica gel modified with aluminium' , Journal of Chromatography A, vol. 804, no. 1-2 , pp. 171-177 , doi: 10.1016/S0021-9673(97)01248-X.

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Abstract

The presence of aluminium in the silica matrix causes an enhancement of the acidity of the silanol group on silica gel. Therefore, in order to prepare silica-based cation-exchangers for ion chromatography (IC) under strongly acidic eluent conditions, modification of silica gel with aluminium using a coating method was carried out. As a result, aluminium-adsorbing silica gels were found to act as a cation-exchangers under strongly acidic eluent conditions and were successfully applied to the conductimetric detection IC for the separation of common mono- and divalent cations using nitric acid–2,6-pyridinedicarboxylic acid eluent. These results strongly indicate that the modification is a simple and effective way for the preparation of advanced silica-based cation-exchangers for IC.

Item Type: Article
Authors/Creators:Ohta, K and Morikawa, H and Tanaka, K and Haddad, PR
Keywords: Metal cations; Aluminium-modified silica; Silica; Stationary phases, LC
Journal or Publication Title: Journal of Chromatography A
ISSN: 0021-9673
DOI / ID Number: 10.1016/S0021-9673(97)01248-X
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