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Comparison of Nonporous Silica-based Ion Exchangers and Monolithic Ion Exchangers in Separations of Inorganic Anions by Anastasiya Yu Kanatyeva; Elena N. Viktorova; Alexander A. Korolev; Alexander A. Kurganov is a Chemistry article available to read on EtoBox.
What is Comparison of Nonporous Silica-based Ion Exchangers and Monolithic Ion Exchangers in Separations of Inorganic Anions about?
## Abstract Low capacity anion exchangers for IC have been prepared by modification of nonporous uniformed silica MICRA microbeads and by modification of the organic polymeric monolithic matrixes prepared __in situ__ in quarz capillary. Due to the small particle size (1.5 μm) high‐performance adsorbents were prepared allowing to obtain up to 190 000 tp/m. However, the column possesses a very high back‐pressure and can be used in a short length up to 50 mm only to meet the requirements of conventional chromatographic equipment. An analysis of a test mixture of seven anions was completed within 3 min with a back column pressure of about 350 bar (HETP of about 5.5 μm, where HETP is the height equivalent to the theoretical plate). Monolithic capillary columns provide lower efficiency __per__ column unit length than MICRA columns; however, they can be used at a longer length because of their low flow resistance. Monolithic column of __ca.__ 40 cm length has workable pressure below 10 bar and allows separation of a five anions test mixture within less than 10 min. A better efficiency of monolithic column (HETP ̃75 μm) can be achieved at reduced flow rates when the analysis time is not a
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It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- Anastasiya Yu Kanatyeva; Elena N. Viktorova; Alexander A. Korolev; Alexander A. Kurganov
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 1615-9306)
- Published
- 2007
- Language
- EN
- Field
- Chemistry (Physical Sciences)