Trennung und Identifizierung optischer Aufheller durch ein- und zweidimensionale Dünnschicht-Chromatographie

Separation and Identification of Optical Brighteners by One and Two-Dimensional Thin-layer Chromatography Technical optical brighteners are separated into ionic and non-ionic groups on various layers of adsorbents and their mixtures resolved using polar mobile phases of basic nature, the non-ionic fluorescent agents are separated by one- and two-dimensional procedure. Besides a few exceptions, the technical brighteners invariably show more than one spots. Although from the number of these spots no conclusion can be drawn regarding the number of components present in the orginal fluorescent substance, however, exact identification of these brighteners is possible with the help of the Rf-values obtained. The solubility of technical brighteners in various solvents and solvent mixtures has been studied.