Identification points:
Different odors, Xiangjiapi has a special aroma, and Wujiapi has no.
1, trait identification
1 Five plus skin: irregularly rolled. Appearance gray-brown (brown) color, with horizontal oval lenticels, twisting vertical lines. The inner surface is yellowish-white (grey-yellow), with fine vertical stripes, and the fracture surface is slightly flattened. Under the magnifying glass, the light yellowish-brown dots (resin channel) are slightly sweet and slightly spicy.
2 incense plus skin: roll, trough. The outer surface is gray (yellow) brown and the cork is exfoliated. The inside surface is yellowish-white or light reddish-brown with fine vertical stripes. The cross-section is easily broken and irregular. Strong specific aroma, bitter taste, slight tingling feeling.
2, microscopic identification (powder)
1 Wujiapi: Calcium oxalate cluster crystals are more, arranged in rows, sometimes containing crystal cells, the resin channel debris is easy to see colorless or yellow grease-like secretions, cork cells are rectangular or polygonal, thin wall.
2 Fragrant plus calcium oxalate has a small number of crystals. The stone cell wall is thick, and the cavity is small, and the pore ditch is obvious. The milk tube is easy to see, with a drop of colorless oil, and the cork cells are brown and polygonal.
3, the difference between ingredients
1 Wujiapi: root bark contains volatile oil and resin, the main component of the oil is 4-methyl salicylaldehyde, in addition it contains tannin, palmitic acid, linolenic acid and vitamin A and B1.
2 incense plus skin: root bark contains more than ten kinds of glycoside compounds, there is a strong heart glycosides liuxin glycosides and willow saponin K, H, E, still containing aroma components 4-methyl salicylaldehyde.
4, physical and chemical identification
Take two herbs of water or alcohol leaching solution and observe under UV light. The leaching solution of Xiangjiapi showed purple fluorescence, dilute hydrochloric acid, and the fluorescence did not change. Add sodium hydroxide solution to produce yellow-green fluorescence. However, there is no such reaction in the leachate of Acanthopanax senticosus.
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