Anthocyanin Pigments of Rhubarb, Canada Red

摘要

SUMMARYThe anthocyanin pigments of rhubarb (Rheum rhaponticum‘Canada Red’) were extracted with 0.02 methanolic HCI and partially purified by use of cation‐exchange resin. The pigments were separated into two bands with paper and cellulose thin‐layer chromatography. The purified pigmentswerecharacterized by their R, values, partial acid hydrolysis, identification of the aglycones and sugars after complete hydrolysis, and their spectral properties. The main pigment (87 of the total anthocyanins) was identified as cyanidin‐3‐glucoside and the second (13) is proposed to be cyanidin