Vacuum freeze-drying process of callicarpa leaf and preparation process of callicarpa leaf powder

Abstract

The invention discloses a vacuum freeze-drying process of callicarpa leaf and a preparation process of callicarpa leaf powder. The vacuum freeze-drying process of the callicarpa leaf comprises the following steps: (1) selecting raw materials; (2) cleaning: quickly leaching the callicarpa leaf; (3) pre-drying: pre-drying the callicarpa leaf till water content is 60-70%; (4) loading onto a plate and pre-freezing: loading the pre-dried callicarpa leaf onto the plate, and gradually cooling for 2-3 hours, and then pre-freezing at the temperature of (-20)-(-40) DEG C, wherein the loading weigh is 2.7-4 kg / m<2> and the loading thickness is 2-3 cm; (5) sublimation drying: vacuumizing until the absolute pressure of the system is 100 Pa, entering a heating process, raising the shed temperature to 40-70 DEG C while controlling the vacuum degree at 55-65 Pa, and carrying out sublimation drying for 10-15 hours; and (6) desorption drying: maintaining the material temperature at 20-50 DEG C and discharging when the water content is below 3%. In the vacuum freeze-drying process of the callicarpa leaf disclosed by the invention, the vacuum freezing time, temperature, pressure and other parameters are reasonably set, so that the pharmaceutically active ingredients are maximally maintained.

Description

technical field [0001] The invention belongs to the technical field of traditional Chinese medicine preparation technology, and in particular relates to a process of vacuum freeze-drying traditional Chinese medicine Auranthus aurantiae leaves to retain medicinal active ingredients and a preparation process of Auranthus aurantiae indica powder. Background technique [0002] Purple pearl leaves are the dry leaves of Callicarpa formosana Rolfe, a plant of Verbenaceae, picked when the branches and leaves are lush in summer and autumn, and dried. Fresh leaves are oblong, elliptic or ovate-elliptic, 4-19cm long, 2.5-9cm wide, apex acuminate or obtuse, base broadly cuneate or obtuse, margins finely serrated. The dry leaves are in the shape of curly and broken filaments, with different lengths; the upper surface is gray-green or brown-green, covered with stellate hairs or short coarse hairs; the lower surface is light green or light brown-green, densely covered with yellow-brown ste...

AI Technical Summary

Problems solved by technology

⑤Analgesic effect: The analgesic effect of Zizhu was studied by acetic acid twisting method. The results showed that the alcohol extract of Zizhu leaf had obvious analgesic effect on mice. Activity evaluation, experiments show that the plant's triterpenoids and flavonoids have a good analgesic effect, but its mechanism of action is still unclear

However, in the traditional drying or processing process, the active ingredients are easily lost or destroyed, thereby significantly reducing the efficacy and active ingredients; what can not be ignored is that the water content of the leaves dried by traditional methods is almost 15 %, easy to mildew, difficult to store and utilize

Images