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KMID : 1059519840280030176
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Journal of the Korean Chemical Society
1984 Volume.28 No. 3 p.176 ~ p.184
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Ion-Pair Chromatography of Benzoic Acid and Its Derivatives on XAD-2
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Kang Sam-Woo
Ryu Sam-Gon
Park Young-Kyu
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Abstract
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Retention behavior of benzoic acid and its derivatives on XAD-2 in the alcoholic aqueous solution was investigated and separation was attempted. Retention was affected by the concentration and kinds of added organic solvents, the pH of the aqueous solution, the added R4N+ and the position and kinds of functional group in the sample molecules. Retention of sample acids in acidic conditions was due to mainly molecular adsorption on nonpolar XAD-2 surface and that in basic conditions was due to mainly ion-pair model. In these bases a mixed sample was separated in EtOH 20% aqueous solution at pH 8.50.
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