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Counter-current chromatography of black tea infusions
B L Wedzicha1, M F Lo, T J Donovan
1Procter Department of Food Science, University of Leeds, U.K.
Journal of Chromatography
|May 4, 1990
Abstract:
Counter-current chromatography using a multilayer coil planet centrifuge, with solvent system ethyl acetate-butanol-water, permits the separation of black tea infusions into fractions which include pure SII and a mixture of SI and SIa thearubigins. Good resolution of several components of the infusion may be achieved in elution times of 1 to 2 h. The appearance of chromatograms is altered on decaffeinating the infusion. The effect of stationary phase composition is considered. Resolution of the peaks improves with butanol content.