Summary
Comparison of different techniques for modifying internal glass surfaces to accept a substrate loading on wall coated open tubular columns (WCOT) were examined. Inner surfaces pretreated with a non-extractable Carbowax 20M layer, barium carbonate and silica whiskers were prepared and coated with a Carbowax 20M liquid phase. The columns were evaluated for efficiency, acidic-basic and adsorption properties, thermal stability and coating efficiency. Column performances were also assessed for deactivated surfaces. Each column was applied to a standard mixture of Aroclor 1016.
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Onuska, F.I., Comba, M.E. Comparison of surface modification techniques used for the preparation of wall coated open tubular glass capillary columns. Chromatographia 10, 498–503 (1977). https://doi.org/10.1007/BF02257366
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DOI: https://doi.org/10.1007/BF02257366