1, look at the appearance
The appearance of Dendrobium candidum is usually yellow-green, translucent and shiny. The stem of Dendrobium candidum is cylindrical, with purple-brown or purple-brown surface and longitudinal edges or branch edges; There are obvious leaf sheaths on the stem nodes; The stems are slightly twisted, and most of them are twisted into tubes. The stem of Dendrobium candidum is short and hard, brittle and easily broken.
Step 2 smell it
Dendrobium candidum flowers are fragrant, with a faint fragrance and a faint sweetness. The more delicate the Dendrobium flowers are, the more nutritious the Dendrobium roots are. It is said that Dendrobium flowers were used to make tea as early as the Qing Dynasty and were regarded as treasures.
3. Look at the moisture.
The water content of Dendrobium candidum is generally about 5-8%. If it is dry, it won't be very wet. Dendrobium candidum is naturally curved, with yellow-green or yellow-white surface and translucent shape. Dendrobium candidum is usually brittle and hard.
Step 4 look at the place of origin
Dendrobium candidum is mainly distributed in Zhejiang, Jiangxi, Fujian, Hubei, Guangdong and other places, among which Dendrobium candidum in Tiantai, Zhejiang is the most famous.
Step 5 look at the content
Dendrobium polysaccharide is the main component of Dendrobium officinale, and the content of polysaccharide is the main basis for judging the quality of Dendrobium officinale at present. China Pharmacopoeia stipulates that the polysaccharide content of Dendrobium candidum should not be less than 25.0%. The higher the polysaccharide content, the heavier the weight, the more sticky the chewing, and the better the quality. It is sticky, sweet and residue-free.