Novel stationary phase with regulated anion exchange capacity
journal contribution
posted on 2023-05-16, 19:58 authored by Kiseleva, MG, Nesterenko, PNA novel stationary phase - phenylaminopropyl (PLA) bonded silica - is proposed for anion-exchange chromatography. Low basicity (pKa about 2.5) attached to silica phenylaminopropyl groups allows a variation of surface density of protonated sites in the pH range from 2 to 5. This enables us to use the same column for the separation of anions having different affinity to anion-exchangers. The effect of mobile phase pH on conditional capacity of PhA-silica was studied. The hypothesis on dependence of ion-exchange selectivity on the column capacity is discussed. Suitability of PhA-silica for ion-chromatographic separation of organic and inorganic anions at different pH values of eluent was demonstrated. © 2001 Elsevier Science B.V.
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Publication title
Journal of Chromatography AVolume
920Issue
1-2Pagination
87-93ISSN
0021-9673Department/School
School of Natural SciencesPublisher
Elsevier BVPlace of publication
NetherlandsRepository Status
- Restricted
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