Main Costituent of the Yellow Pigment in Persimmon Skin and Its Extraction Technology

It was determined by color reaction detection and UV-VIS-spectrophotometry that main constituent of yellow pigment in persimmon skin was carotenoid.Influential factors,including type of extraction solvents,ratio of mass of solid persimmon skin to volume of the extraction solvent,temperature,time and frequency of extraction,were studied by the method of orthogonal design,and the following parameters were obtained:① absolute alcohol was selected as extraction solvent;② ratio of mass of persimmon skin to volume of ethanol was 1 g to 20 mL;③ extraction was carried out at 60 ℃ for 2.5 h,and two extractions were necessary for each batch.Rate of extraction was found to be 80.74 mg per 100 g.