The invention belongs to the technical field of
pigment extraction, and discloses
banana peel yellow
pigment and an extraction method thereof. The extraction method comprises (1) chopping clean bananapeel with the soft part in the inner layer removed, then soaking the chopped
banana peel in a specially-made color protection solution, then soaking the
banana peel in a tetrapotassium pyrophosphateaqueous solution, and performing
filtration to obtain filter dregs; (2) sequentially subjecting the filter dregs to extraction using
ethanol,
acetone,
ethyl acetate,
petroleum ether, and other solvents, and subjecting
solid to repeated extraction with a recovered mixed
solvent until extract liquid is colorless; and (3) combining the extracting liquid, concentrating the mixture into paste, adding water into the paste concentrate, ultrasonically mixing the paste concentrate and the water, carrying out rotary
evaporation to a viscous state, freezing the product at low temperature, and carrying out
vacuum drying to obtain yellow
pigment particles. The extraction method disclosed by the invention is simple to operate, low in cost, and high in extraction efficiency, the extracted pigment is stable and not easy to oxidize, the development and utilization value of the banana peel is improved, the
resource utilization of the waste banana peel is promoted, and the yellow pigment has relatively high economic value and social value.