Rosemary extract and preparation method and application thereof
The invention discloses a rosemary extract and a preparation method and application thereof. The rosemary extract is obtained by the following steps of: drying fresh rosemary branches and leaves, filling into a Soxhlet extractor, performing ethanol extraction by using the siphon principle, performing rotary evaporation on the extract under the condition that the vacuum degree is controlled to be 0.094 to 0.096MPa, and thus obtaining the ethanol-soluble powdery rosemary extract. The rosemary extract serving as a sun-screening agent is applied to sun-screening cream, namely the sun-screening cream contains 0.02 to 2 mass percent of rosemary extract. The rosemary extract has the advantages of low irritation, good sun-screening effect, oxidation resistance and light color, and does not affect the color of the prepared sun-screening cream; and the preparation method for the rosemary extract is simple, feasible and high in extracting efficiency.