Method for improving preservation efficiency of rosmarinic acid in rosemary material

Abstract

The invention discloses a method for improving the preservation efficiency of rosmarinic acid in a rosemary material, which comprises the following steps: S1, picking: harvesting fresh rosemary leaves, and removing stems; s2, sample cleaning: cleaning the collected leaves, and spin-drying the leaves by using a spin-drying machine; s3, pre-freezing the sample: carrying out pre-freezing treatment on the cleaned and spin-dried sample in an ultralow-temperature refrigerator or liquid nitrogen; and S4, freeze vacuum drying: putting the sample subjected to pre-freezing treatment in the previous step into a freeze dryer for drying treatment, and then carrying out freeze-drying treatment. By adopting the detection and preservation method designed by the invention, after the fresh rosemary leaves are treated by a vacuum freeze drying technology, the preservation effect of the effective component rosmarinic acid in the rosemary is extremely remarkable by vacuum freeze drying, and after the rosemary is treated by vacuum freeze drying, the content of the rosmarinic acid is 11.26 times of that of the rosemary treated by common drying, and the content of the rosmarinic acid in the rosemary treated by the vacuum freeze drying technology is 1.26 times of that of the rosmarinic acid in the rosemary treated by common drying. And the content of hesperidin and the content of carnosic acid are respectively 1.64 times and 1.66 times of the content of hesperidin and the content of carnosic acid after common drying.

Description

technical field [0001] The invention relates to the technical field of rosemary, in particular to a method for improving the preservation efficiency of rosmarinic acid in rosemary materials. Background technique [0002] Rosmarinic acid is a water-soluble natural phenolic acid compound isolated from rosemary. It is a natural antioxidant that helps prevent cell damage caused by free radicals and has strong anti-inflammatory activity , widely used in pharmaceutical, food, cosmetics and other fields. At present, rosmarinic acid is mainly extracted from plants of Labiatae and Boraginaceae. Rosemary is widely used in herbal tea and diet production. The leaves have a short storage time and are prone to mildew and pollution. Rosemary is usually stored in the form of drying after picking, but the drying treatment will greatly reduce the active ingredient rosmarinic acid in rosemary. Contents of the invention [0003] The object of the present invention is to provide a method for ...

AI Technical Summary

Problems solved by technology

[0002] Rosmarinic acid is a water-soluble natural phenolic acid compound isolated from rosemary. It is a natural antioxidant that helps prevent cell damage caused by free radicals and has strong anti-inflammatory activity , widely used in pharmaceutical, food, cosmetics and other fields. At present, rosmarinic acid is mainly extracted from plants of Labiatae and Boraginaceae. Rosemary is widely used in herbal tea and diet production. The leaves are stored for a short time and are prone to mildew and pollution. Rosemary is mostly stored in the form of drying after picking, but the drying process will greatly reduce the active ingredient rosmarinic acid in rosemary.

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