| Autor: |
Pirogov, A. V., Svintsova, N. V., Kuzina, O. V., Krokhin, O. V., Platonov, M. M., Shpigun, O. A. |
| Zdroj: |
Fresenius' Journal of Analytical Chemistry; Jun1998, Vol. 361 Issue 3, p288-293, 6p |
| Abstrakt: |
An approach, which is based on the fact that an anion-exchange layer may be bound at the surface of a cation-exchanger by electrostatic interaction of reversibly-charged functional groups, was used for producing polyelectrolyte anion-exchangers. Water-soluble polymers containing positively charged nitrogen atoms were used instead of anion-exchanging latex. A sulfonated co-polymer of styrene and divinylbenzene was replaced with a sorbent for reversed-phase chromatography (silica coated with dodecylbenzenesulfonic acid). The ion-chromatographic behavior of transition metal complexes with ethylenediaminetetraacetic acid (EDTA) and cyclohexanediaminetetraacetic acid (CDTA) separated on sorbent Silasorb-C18, modified by polyvinylpyridinium bromide (PEVP), polydimetyldiallylammonium chloride (PDMDAA), and polyhexamethyleneguanidine chloride (PGMG) was investigated. The limits of detection were 0.1–1 mg/L and 0.01–0.05 mg/L for single and dual-columns, respectively. A comparison of synthesised Silasorb C18-DBSA-PEVP anion-exchanger with several commercial packed materials (Hiks-1, Anieks, TSK gel IC-Anion-PW, TSK gel IC-Anion-SW, BT XI An, Nucleosil 10 SB) was carried out. It was shown that BT I An and BT II An anion-exchangers cannot be used in determining transition metal complexes with EDTA due to high non-ion-exchange sorption of hydrophobic complex anions on the polymer matrix. Silasorb C18-DBSA-PEVP showed the highest selectivity in separating anion complexes of transition metals with EDTA. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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