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Evaluation on the adsorption capabilities of new chemically modified polymeric adsorbents with protoporphyrin IX |
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| Authors: | Jung M W Ahn K H Lee Y Kim K P Paeng I R Rhee J S Park J T Paeng K J |
| Affiliation: | Division of Analytical Chemistry, Lomonosov Moscow State University, Vorob’evy Gory GSP-3, Moscow 119899, Russian Federation |
| Abstract: | A 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. |
| Keywords: | Inorganic anions |
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