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Ion Chromatography on a latex-coated silica monolith column
journal contribution
posted on 2023-05-16, 21:24 authored by Glenn, KM, Lucy, C, Paul HaddadPaul HaddadA silica monolith column (Merck Chromolith, 100 mm × 4.6 mm) has been coated with Dionex AS9-SC latex nanoparticles to convert the column into an anion-exchange stationary phase. For comparison purposes, a reversed-phase silica monolith was also converted into an anion-exchange column by coating with the cationic surfactant didodecyldimethylammonium bromide (DDAB). Separations of common inorganic anions were carried out using 7.5 or 5.0 mM 4-hydroxybenzoic acid at pH 7.0 along with suppressed conductivity detection. Direct comparisons were then made between the two columns in terms of selectivity, efficiency and stability. The latex-coated column was on average 50% more efficient than the DDAB-coated column. A 10% decrease in retention times was observed on the DDAB column over 11 h of continuous eluent flow, while the latex coating exhibited <1% change in retention even after 2.5 months of periodic use.
History
Publication title
Journal of Chromatography AVolume
1155Pagination
8-14ISSN
0021-9673Department/School
School of Natural SciencesPublisher
Elsevier SciencePlace of publication
AmsterdamRights statement
The definitive version is available at http://www.sciencedirect.comRepository Status
- Restricted