Abstract
This manuscript describes the preparation of a simple effective ion-exchange material based on silica gel, on the surface of which methylimidazolium bromide is fixed using a click reaction. The resulting material was used as a stationary phase for the separation and determination of Cl–, NO2–, NO3–, I–, and SO42– using ion exchange chromatography. The separation efficiency and retention factors for the selected anions were studied in the pH range 3.5–6.5. The proposed material was used for the determination of Cl–, SO42– in water and can be suggested for successful use in real water samples.
Highlights
The development of new anion-exchange phases with improved efficiency and selectivity is one of the topical problems of modern ion chromatography [1]
Organic polymers can be considered as the most convenient and common matrices for the design of anion exchangers. Such materials as zirconia, alumina, and, especially, silica gel are quite often used for the preparation of organomineral materials, stationary phases in chromatography and adsorbents for solid-phase extraction
Silica-based anion exchangers are often used in the pH range 2.0–9.5
Summary
The development of new anion-exchange phases with improved efficiency and selectivity is one of the topical problems of modern ion chromatography [1]. Organic polymers can be considered as the most convenient and common matrices for the design of anion exchangers Such materials as zirconia, alumina, and, especially, silica gel are quite often used for the preparation of organomineral materials, stationary phases in chromatography and adsorbents for solid-phase extraction. Compared to organic polymers, silicabased ion exchangers have the advantages of higher chromatographic efficiency and greater mechanical stability. Such materials are preferable for operation in the nonsuppressive version of ion chromatography with conductometric detection, since in this case it is necessary to use dilute eluents, which is possible with materials of low exchange capacity
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