Freeze-dried dendrobium officinale powder and preparation method thereof

Abstract

The invention discloses freeze-dried dendrobium officinale powder and a preparation method thereof. The method comprises the steps of (1) cleaning fresh picked dendrobium officinale with water, drying, and cutting the dendrobium officinale into sections which are 2-4cm long; (2) putting the dried dendrobium officinale into a juicing machine, adding pure water according to a ratio of material to liquid being 1g:5ml and juicing; (3) freezing the dendrobium officinale juice at the temperature of -20 DEG C for one night; (4) pre-cooling vacuum freeze-drying equipment at the temperature of -56 DEG C for half an hour; and (5) putting a frozen dendrobium officinale product into the pre-cooled vacuum freeze-drying equipment, and performing vacuum freeze-drying treatment under conditions that the temperature is -56 DEG C and the vacuum degree is 7-9Pa for 18-30 hours so as to obtain the freeze-dried dendrobium officinale powder. The method is simple, is easy to operate and is low in production cost; the obtained freeze-dried dendrobium officinale powder product is loose, is rich in dendrobium officinale polysaccharide, does not contain fibers and is high in dissolvability; the utilization rate of the officinale polysaccharide is high; furthermore, the original state of dendrobium officinale is retained, and the freeze-dried dendrobium officinale powder is light green, has a fresh taste and medicinal effects and can be stored and transported under normal temperature; the retention period is effectively prolonged.

Description

technical field [0001] The invention relates to the field of food processing, in particular to freeze-dried dendrobium officinale powder and a preparation method thereof. Background technique [0002] Dendrobium officinale Kimura et Migo is a perennial herbaceous plant of the genus Dendrobium in Orchidaceae. It is a traditional precious Chinese herbal medicine in my country. Among the traditional Chinese medicinal materials in my country, Dendrobium candidum first appeared in the "Shan Hai Jing"; as early as the Qin and Han Dynasties, "Shen Nong's Herbal Classic" recorded that Dendrobium officinale was "sweet and flat. In the main injury, it can remove numbness, lower qi, and nourish the five internal organs. Labor, win weakness, strong yin. Take it for a long time, thicken the stomach, lighten the body, and prolong life". More than 1,000 years ago, "Tao Zang" listed Dendrobium candidum as the first of the "Nine Chinese Immortal Grasses"; Li Shizhen commented in "Compendium ...

AI Technical Summary

Problems solved by technology

[0003] Because Dendrobium candidum has good medicinal value and health value, people’s demand for it is increasing day by day, but the fresh product of Dendrobium candidum has a short storage time, and although it can prolong the storage time after drying, the sensory indicators become worse, especially the , effective physiologically active active ingredients are also affected, resulting in a decrease in their efficacy

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