Surface Roughening by Sodium Chloride Deposition for the Preparation of Organic Molten Salt Open Tubular Columns

Abstract

Sodium chloride deposition is a useful method of enhancing the film-forming properties of tetra-n-butylammonium tetrafluoroborate on a smooth or whisker-modified glass surface. A combination of whisker formation followed by deposition of a layer of sodium chloride was required to form films of the highest efficiency and temperature stability. Deposition of a single layer of sodium chloride on a smooth glass surface provides a simple and rapid procedure for preparing molten salt columns when the highest column efficiencies are not demanded. For both column types a decline in performance with increasing temperature above the melting point of the molten salt is observed. The practical utility of the columns is demonstrated by the separation of Arochlors, chlordane, and substituted naphthalene derivatives.