Preparation method of L-carnitine amino acid deep eutectic solvent and application thereof in polyphenol extraction

The invention discloses a preparation method of an L-carnitine amino acid deep eutectic solvent and application thereof in polyphenol extraction. The preparation process of the deep eutectic solvent includes: weighing a certain mass of L-carnitine and performing dissolving in water, also weighing another part of amino acid and performing dissolving in a solvent, conducting stirring dissolving, andtransferring the product into a dropping funnel, adding the amino acid solution into the L-carnitine aqueous solution dropwise under a stirring state, then performing stirring at 25-60DEG C for 12h,and conducting rotary evaporation to remove the solvent, thereby obtaining the L-carnitine amino acid deep eutectic solvent. According to the method, the influence of the deep eutectic solvent content, the extraction time and the extraction temperature on the extracted polyphenol content is explored, and an optimal extraction condition is determined. Researches show that: the L-carnitine amino acid deep eutectic solvent ha