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Ion chromatographic determination of hydroxide ion on monolithic reversed-phase silica gel columns coated with nonionic and cationic surfactants
Citation
Xu, Q and Mori, M and Tanaka, K and Ikedo, M and Hu, W and Haddad, PR, Ion chromatographic determination of hydroxide ion on monolithic reversed-phase silica gel columns coated with nonionic and cationic surfactants, Journal of Chromatography A, 1041, (1-2) pp. 95-99. ISSN 0021-9673 (2004) [Refereed Article]
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DOI: doi:10.1016/j.chroma.2004.05.005
Abstract
The determination of hydroxide by ion chromatography (IC) is demonstrated using a monolithic octadecylsilyl (ODS)-silica gel column coated first with a nonionic surfactant (polyoxyethylene (POE)) and then with a cationic surfactant (cetyltrimethylammonium bromide (CTAB)). This stationary phase, when used in conjunction with a 10 mmol/l sodium sulfate eluent at pH 8.2, was found to be suitable for the rapid and efficient separation of hydroxide from some other anions, based on a conventional ion-exchange mechanism. The peak directions and detection responses for these ions were in agreement with their known limiting equivalent ionic conductance values. Under these conditions, a linear calibration plot was obtained for hydroxide ion over the range 16 μmol/l to 15 mmol/l, and the detection limit determined at a signal-to-noise ratio of 3 was 6.4 μmol/l. The double-coated stationary phase described above was shown to be superior to a single coating of cetyltrimethylammonium bromide alone, in terms of separation efficiency and stability of the stationary phase. A range of samples comprising solutions of some strong and weak bases was analyzed by the proposed method and the results obtained were in good agreement with those obtained by conventional potentiometric pH measurement.
Item Details
Item Type: | Refereed Article |
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Keywords: | Monolithic columns; Stationary phases, LC; Coated columns; Hydroxide; Inorganic anions; Surfactants |
Research Division: | Chemical Sciences |
Research Group: | Analytical Chemistry |
Research Field: | Separation Science |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding Knowledge |
Objective Field: | Expanding Knowledge in the Chemical Sciences |
UTAS Author: | Haddad, PR (Professor Paul Haddad) |
ID Code: | 31935 |
Year Published: | 2004 |
Web of Science® Times Cited: | 14 |
Deposited By: | Chemistry |
Deposited On: | 2004-08-01 |
Last Modified: | 2010-02-02 |
Downloads: | 0 |
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