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Separation and determination of quaternary ammonium compounds by high-performance liquid chromatography with a hydrophilic polymer column and conductometric detection |
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| Authors: | Masami Shibukawa Reiko Eto Akiko Kira Fusae Miura Koichi Oguma Hideki Tatsumoto Hisako Ogura Akira Uchiumi |
| Institution: | a Department of Industrial Chemistry, College of Industrial Technology, Nihon University, 1-2-1, Izumi-cho, Narashino 275-8575, Japan b Department of Materials Technology, Faculty of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan c Chiba Prefectural Laboratory of Water Pollution, 3-5-1 Inagegaigan, Mihama-ku, Chiba 261-0005, Japan d Department of Analytical Chemistry, National Institute of Materials and Chemical Research, 1-1 Higashi, Tsukuba 305-0046, Japan |
| Abstract: | An HPLC method has been developed for separation and determination of long alkyl chain quaternary ammonium compounds. A column packed with a hydrophilic polymer packing, Shodex Asahipak GF-310 HQ, and a water–acetonitrile mixture containing 4,4′-bipyridyl and hydrochloric acid were used to depress hydrophobic adsorption of the quaternary ammonium compounds and increase the sensitivity of the conductometric detection with a micromembrane suppressor. Dodecyltrimethylammonium, cetyltrimethylammonium, tetradecyldimethylbenzylammonium and stearyltrimethylammonium ions can be completely separated from one another and quantified at 0.1 nmol level. |
| Keywords: | Quaternary ammonium compounds |
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