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Extraction method of resveratrol


solvent extraction
Solvent extraction is the most widely used extraction method at home and abroad. Commonly used solvent extraction methods mainly include three kinds: percolation method, leaching method and reflux method. Commonly used solvents for reflux extraction of resveratrol include methanol, ethanol, acetone, ethyl acetate, etc., among which 60% to 90% ethanol aqueous solution is the most commonly used for reflux extraction of resveratrol original plants, other solvents are due to low efficiency or relative toxicity Larger and therefore rarely used.

enzymatic extraction
Resveratrol exists in the form of resveratrol glycosides in many plants, and resveratrol glycosides can be enzymatically hydrolyzed into resveratrol, and then free resveratrol can be extracted. Using this method can achieve higher yields, so some researchers have used enzymatic hydrolysis to extract resveratrol. There are three sources of enzymes in enzymatic extraction: using plant's own enzymes, adding external enzymes and producing enzymes by inoculating microorganisms.

microwave extraction
Microwave extraction is a method in which the temperature of plant cells rises rapidly after absorbing microwave energy in a microwave field, and they expand and rupture, which is beneficial to the extraction of active ingredients in plants. This method is more commonly used in laboratory research.

supercritical carbon dioxide extraction
Supercritical CO2 extraction is a process of extracting or separating certain components in a mixture using CO2 fluid in a supercritical state as a solvent. Supercritical CO2 is characterized by stable properties, non-toxicity, and no pollution to the environment. It has strong Excellent penetration and solubility, as well as good transport and fluidity.