Abstract
Inorganic anions were separated on a chemically bonded 18-crown-6 ether (18C6E) stationary phase in capillary ion chromatography. In this study 18C6E groups were chemically bonded on silica gel via reaction with 3-glycidyloxypro-pyltrimethoxysilane, followed by reaction with 2-aminomethyl-18C6E. Analyte anions were separated in the ion-exchange mode based on the fact that the eluent cation was trapped on the 18C6E and it worked as the anion-exchange site. The eluent cation and eluent anion as well as the eluent concentration affected the retention of the analyte anions. Different selectivity was achieved by using an acetonitrile-rich eluent. The present stationary phase was applied for the determination of UV-absorbing anions contained in saliva samples.
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Takeuchi, T., Tokunaga, K. & Lim, L.W. Separation of Inorganic Anions on a Chemically Bonded 18-Crown-6 Ether Stationary Phase in Capillary Ion Chromatography. ANAL. SCI. 29, 423–427 (2013). https://doi.org/10.2116/analsci.29.423
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DOI: https://doi.org/10.2116/analsci.29.423