Looking for medicinal materials: identification of 7 kinds of medicinal materials

We all know that traditional Chinese medicine can help treat diseases, but most people may not know much about the selection and purchase of medicinal materials used in traditional Chinese medicine, so is there any better way to distinguish the authenticity of medicinal materials?

Fat sea

Put into hot water to expand into a sponge, up to 8 times the original volume. The seeds of the fake round apple expanded slowly into the water, only up to twice the original volume.

Safflower

After soaking in water, the water turns golden and the flowers do not fade.

Sappan wood

The fragments are put into hot water and the water is dyed red. The counterfeit wood is dyed and immersed in hot water to show light yellow, yellow and orange.

Bupleurum chinense

The authentic water extract has no foam reaction. However, the water extract of fake Yinchaihu has a strong foam reaction.

Bezoar

Put into clear water, can absorb water to become moist but not deformed, insoluble, non-decolorizing, non-turbid. Add a little water to mix, apply to the nails, can dye the nails yellow, commonly known as "hanging nails". Counterfeit products are often forged with powders such as Coptis chinensis, rhubarb, turmeric, chicken egg yolk or potatoes plus plant pigment, which are quickly dissolved, broken and turbid when they enter the water.

Toad venom

The authentic surface or cross-section is stained with water and quickly appears milky liquid and bulges. The adulterer also showed milky liquid in the water, but the liquid spilled slowly and did not bulge.

Donkey-hide glue

Take E Jiao to dissolve in boiling water, the solution is brownish red, relatively clear, there is no precipitation in the lower layer, clear but not turbid. The counterfeit skin glue is brown in water, sinking large pieces of glue filament and black residue. Substitute new gelatin aqueous solution is brown, the lower layer of black residue and flocs are often precipitated, turbid and opaque, there is fatty oil on the surface.