High efficient preparation process of celery anti-oxide

Abstract

The invention discloses a highly efficient preparing method of celery antioxidant substance, including the following steps: 1, selecting fresh celery varieties, and drying by microwave-hot air-microwave combined process; 2, crushing the dried raw material by a ultramicro crusher into fine powder; 3, using 95%-100% alcohol as solvent for extracting at 50 deg.C; 4, vacuum- concentrating the extract; 5, adopting macroporous absorbing resin to make absorption process on the concentrated extract, and using 65-75% alcohol to make desorption process, and obtaining purified extract of celery antioxidant substance; 6, vacuum-concentrating the purified extract of celery antioxidant substance, and freeze-drying and obtaining the celery antioxidant substance.

Description

technical field [0001] The invention relates to a high-efficiency preparation method of celery antioxidant substances. Background technique [0002] The existing methods for preparing antioxidant substances in plants mainly select a suitable solvent for extraction according to the polarity and water solubility of the active substances in the raw materials. Its core technology is mainly to solve the problems of raw material drying, crushing, solvent selection, concentration and purification of extract, and drying of concentrate. [0003] At present, the raw material drying method is mainly the hot air drying method, which has slow heating speed, long drying cycle, large energy consumption, serious loss of antioxidant active substances and nutrients, resulting in low extraction rate of antioxidant substances. [0004] Raw material crushing mainly adopts ordinary crushing method, the raw material has large particle size, small specific surface area, and small contact area with...

AI Technical Summary

Problems solved by technology

[0003] At present, the raw material drying method is mainly hot air drying method, which has slow heating speed, long drying cycle, large energy consumption, serious loss of antioxidant active substances and nutrients, resulting in low extraction rate of antioxidant substances

[0004] The raw material crushing mainly adopts the ordinary crushing method, the raw material has a large particle size, a small specific surface area, and a small contact area with the solvent, which is not conducive to the dissolution of substances

[0005] Existing solvent extraction methods mainly include the following: ① Alcohol extraction: Methanol and ethanol are commonly used solvents for extracting antioxidant substances, and the number of extractions is generally 2 to 4 times. Due to the low concentration of methanol and ethanol, the purity of the extract is low; ② hot water extraction: due to the extraction of impurities, it is not often used; ③ alkaline dilute alcohol or alkaline water extraction: during alkaline extraction, due to alkaline Under certain conditions, the mother nucleus structure of antioxidant substances will be destroyed; ④ System solvent extraction: that is, extraction with solvents from small to large polarities in sequence can extract most of the free antioxidant substances, but this method is currently only used in laboratories , it is difficult to industrialize

[0006] The purification methods of the extract include chromatography, precipitation, pH gradient extraction and supercritical CO 2 Extraction, etc., but all have shortcomings in varying degrees that limit their industrial production