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Separation of Tetramethylammonium Separation of Quaternary Amines  Primesep C separates a mixture of quaternary amines by a combination of cation exchange, complex formation, and hydrophic interactions. Methyltriethylammonium, tetraethylammonium, and tetramethylammonium cations as well as bromide counter ion are separated on a short 50 mm column. The separation uses a mobile phase mixture of water, acetonitrile (MeCN, ACN) and triethylamine acetate with evaporative light scattering detection (ELSD). Application Analytes: Bromide Methyltriethylammonium Quaternary Amines Tetraethylammonium Tetramethylammonium Application Detection: ELSD/MS Detection Separation of Sodium, Tetramethylammonium and Tetrabutylammonium on Primesep 200 Column
Hydrophilic and hydrophobic quaternary amines, along with sodium ion, were separated by mixed-mode chromatography on a Primesep 200 column. Mechanism of retention for sodium and tetramethylammonium ions is cation exchange, while the tetrabutylammonium ion is retained by combination of reversed-phase and cation-exchange mechanisms. All three compounds are not UV-active and monitoring is done by ELSD/CAD. Application Analytes: Sodium Tetrabutylammonium Tetramethylammonium Application Detection: ELSD/MS Detection |
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