A kind of production method of purple sweet potato fine powder that improves anthocyanin content

Abstract

The invention relates to a purple potato fine powder production method capable of increasing content of anthocyanin. The method comprises the following steps: thoroughly removing potatoes with diseases, cleaning purple potatoes and drying for later use; grinding, finely grinding, filtering potato paste, carrying out dehydration separation on starch milk, extracting the anthocyanin in potato residue and starch milk, cleaning and purifying the starch milk, mixing the starch milk with a purified anthocyanin extract, and evenly mixing the purified anthocyanin extract with the cleaned and purified starch milk. The purple potato fine powder production method has the positive effects that the purple potatoes are taken as main raw materials for producing purple potato fine powder; the anthocyanin in the purple potatoes is firstly separated and purified, the purple potato starch is then purified, and the purple potato starch is mixed with the anthocyanin; the content of the anthocyanin of the dry purple potato starch fine powder is within the range of 0.08-0.15mg / g, so that the unique purple color and the nutritive value of the purple potatoes are protected.

Description

technical field [0001] The invention relates to a method for producing purple sweet potato powder with increased anthocyanin content, belonging to the technical field of agricultural product processing. Background technique [0002] Purple sweet potato (formal name: ginseng potato Dioscorea alata Linn.) is also called black potato, and the potato flesh is purple to dark purple. In addition to the nutrients of ordinary sweet potatoes, it is also rich in selenium and anthocyanins, and is a physiologically alkaline food. Purple sweet potato ranks first among the anti-cancer vegetables announced by the Japanese National Vegetable Cancer Research Center. The production process of purple sweet potato powder includes purple sweet potato cleaning, crushing, starch cleaning, anthocyanin extraction, and then mixing starch and anthocyanin to make several technological stages. Because of its bright color, rich nutrition, and obvious health care functions, Well received by consumers. ...

AI Technical Summary

Problems solved by technology

[0005] Since purple sweet potato anthocyanins are water-soluble pigments, a large amount of anthocyanins are lost during the processing of purple sweet potato powder, which not only pollutes the environment, but also affects the edible value of purple sweet potato powder.