1, character recognition
The whole Poria cocos is round, oval, oblate or irregular, with thin skin, brown or dark brown, rough, wrinkled and shriveled, sometimes falling off locally, hard texture, granular and broken surface, reddish edge, small honeycomb holes inside, white and a little reddish, and some loose roots in the middle, which is called magic block. A slight breath, a faint taste, and a gnawing tooth.
It is best to have a solid weight, brown skin, fine skin, no cracks, fine white cross section and strong adhesion.
2. Powder characteristics
When the tablet is packed with Schneider solution, it can be seen that there are colorless irregular particles, with blunt nodes and slender mycelium at the end. When in contact with water, the chloral solution can stick to gel, and the heating block will dissolve.
When packed with 5% potassium hydroxide solution, slender hyphae can be seen, which are slightly curved and branched, colorless (inner hyphae) or brown (outer hyphae), with a length and diameter of 3-8 (- 16) microns, and occasionally appear in the diaphragm.
3. Physical and chemical identification
Add 1 drop of potassium iodide test solution to the powder, which is dark red. If α -naphthol and concentrated sulfuric acid are added, it will be orange-red to light red.
Take 0.5g of powder, add acetone 10ml, soak in water bath 10min, and filter. Evaporating the filtrate to dryness, adding 1 ml glacial acetic acid to dissolve the residue, and adding 1 drop of sulfuric acid to turn it into red and light brown.
Take 2g of powder by TLC, add 4ml of ether, soak for 24h, filter, concentrate the filtrate to 65438±0ml, and put it on neutral alumina plate. Using benzene -95% ethanol (9: 1) as developing agent, there are two fluorescent spots, yellow-green and purple, under ultraviolet light (254nm).
Extended data:
Wonderful use of poria cocos
Poria cocos powder can be taken with milk or boiled water, and the net content is about 20 grams every morning, which has the best effect of strengthening the spleen.
Poria cocos chicken wonton can be made of Poria cocos powder to treat spleen and stomach weakness, nausea and indigestion. Production method: 50 grams of Poria cocos powder, appropriate amount of chicken and 200 grams of flour. Add water to knead Poria powder and flour into dough, cut chicken into pieces, add ginger, pepper and salt as stuffing, wrap it into wonton, and cook.
Baidu encyclopedia-poria cocos