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Analysis of inorganic anions by electrostatic ion chromatography using zwitterionic/cationic mixed micelles as the stationary phase
journal contribution
posted on 2023-05-16, 12:16 authored by Hu, W, Paul HaddadPaul Haddad, Hasebe, K, Cook, HC, Fritz, JThe inability to separate fluoride, phosphate and sulfate by electrostatic ion chromatography (EIC) was overcome by using an ODS silica column coated with mixed zwitterionic-cationic surfactants as the stationary phase. The best results were obtained using the zwitterionic surfactant, 3-(N,N-dimethylmyristylammonium)-propanesulfonate (C19H41NO3S), and the cationic surfactant, myristyltrimethylammonium, CH3(CH2)13N+(CH3)3, in a 10:1 molar ratio in the column coating solution. With a dilute solution of sodium tetraborate as the eluent the model analyte anions were completely separated in the following elution order: F–, HPO4 2–, SO4 2–, Cl–, NO2 –, Br–, NO3 –. The very early elution of phosphate and sulfate is most unusual and is unique to this system. Detection limits better than 1.1 × 10–4 mM and linear calibration plots up to 7.0 mM were obtained with a suppressed conductivity system.
History
Publication title
Fresenius' Journal of Analytical ChemistryVolume
367Issue
7Pagination
641-644ISSN
0937-0633Department/School
School of Natural SciencesPublisher
Springer-VerlagPlace of publication
GermanyRights statement
The original publication is available at http://www.springerlink.comRepository Status
- Restricted