A method for the separation of sugars by the chromatographic adsorption of their coloured esters

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Abstract
By the action of azobenzene-p-benzoyl chloride (azoyl chloride) on glucose or fructose, in pyridine soln., colored azoyl esters are obtained. These esters are adsorbed from their soln. in organic solvents by various adsorbents from which they are recovered by elution. The adsorption is selective, allowing the separation of mixtures of these esters into their components by chromatographic adsorption. The yields of pure substances, recovered from such mixtures are nearly quantitative. A very small quantity (20 mg.) of the sugar azoyl esters can be separated by this method.

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