Novel method for efficiently extractinganthocyanin from black rice

Abstract

The inventiondiscloses a novel method for efficiently extractinganthocyanin from black rice. The method comprises steps of drying ofa black rice raw material, ultra-fine grinding, soaking in a solvent, ultra-high pressure extraction, filtration and centrifugation, ethanol removal, purification by ion exchange resin and freeze drying. The method comprises the following steps: firstly, black rice available in market or broken black rice formed during processing of the black rice is adopted as a raw material, and cells of the black rice are subjected to wall breaking treatment through superfine grinding; then, ultrahigh pressure assisted ethanol extraction is performed, and the ion exchange resin is combined for separation and purification. Extraction efficiency is high, the black rice anthocyanin with higher purity can be prepared, production cost is low, product stability is good, and popularization is facilitated.

Description

technical field [0001] The invention belongs to the technical field of food processing and relates to a new method for efficiently extracting anthocyanins from black rice. Background technique [0002] A large number of studies have shown that black rice anthocyanins are anthocyanin pigments, which belong to plant polyphenol compounds, which can reduce the incidence of coronary heart disease, improve visual acuity, antioxidant and anticancer activities, and can protect organisms from ultraviolet rays and ionizing radiation. , heavy metal pollution, low temperature and high temperature, etc. Black rice anthocyanins are not only a class of photoprotectants, anti-radiation agents, chelating agents, biological antioxidants and immune enhancers, but also a class of biosemiconductor materials. Studies in recent years have also found that black rice pigment has the functions of anti-venom, anti-cancer, inhibition of HIV replication, and treatment of Parkinson's disease. Therefore...

AI Technical Summary

Problems solved by technology

[0003] In order to extract anthocyanins from plants, people have tried to extract anthocyanins by a variety of methods, such as solvent extraction, supercritical fluid extraction, microwave extraction, ultrasonic technology-assisted extraction, enzyme-assisted extraction, molecular distillation technology , two-phase extraction technology, microbial fermentation method, etc., but it is worth noting that the reported anthocyanin extraction methods have defects, and these defects include: 1) The extraction method is single and the extraction efficiency is low, such as solvent extraction; 2) Some extraction methods have high operational requirements and are difficult to popularize, such as supercritical fluid extraction, molecular distillation technology, two-phase extraction technology, microbial fermentation method, etc.; 3) extraction methods are expensive and difficult to popularize and apply, such as enzyme-assisted Extraction method, etc.; 4) Anthocyanin loss due to heat in the extraction process, such as microwave extraction method, etc.