Method for extracting carotenoid by using natural deep eutectic solvent

The invention provides a method for extracting carotenoid by using a natural deep eutectic solvent, which mainly solves the technical problems of environmental pollution and harm to human health in the traditional method for extracting carotenoid by using a solvent. Hydrogen bond receptors (choline chloride and DL-menthol) and hydrogen bond donors (tartaric acid, lactic acid and gluconic acid) aremixed according to a certain proportion at the temperature of 80-90 DEG C to prepare the natural deep eutectic solvent, and the solvent is an environment-friendly medium due to the fact that the rawmaterials of the solvent are all non-toxic or extremely low in toxicity. The solvent is mixed with water in a certain volume ratio to serve as an extraction solvent, carotenoid is extracted through adoption of an ultrasonic-assisted method, operation is easy, the extraction time is short, and the extraction efficiency is high. 本发明提供了一种天然深共晶溶剂提取类胡萝卜素的方法，主要解决了传统溶剂提取类胡萝卜素的方法存在污染环境和危害人体健康的技术问题。本发明将氢键受体（氯化胆碱、DL-薄荷醇）与氢键供体（酒石酸、乳酸