Chinese medicine identification and determination
Character identification
Fresh rhizomes are long cylindrical, some are slightly flat, vary in length and diameter, 1-2cm in diameter. The surface is yellowish-white and shiny, and the skin is loose and peelable. Section is ring-shaped, with residual roots and bud marks. Lightweight, tough, hard to break. The fracture surface is yellow-white, hollow, with a wall thickness of 1-2mm, with small holes arranged in a ring. Odorless and sweet. Dried stems are squashed and long cylindrical. The surface is shiny and yellow-white. The festival is hard, with longitudinal wrinkles between red and yellow knots. Light and flexible. Odorless, sweet taste. All of them are uniform, yellowish-white, shiny and rootless.
Microscopic identification
Cross-section of rhizomes: The epidermis is composed of long cells and short cells. The long cell wall is wavy and the short cells are paired. One is silicic cells, the cavity contains siliceous bodies, and the other is hexagonal suppository cells. In the epidermis, there are 3-4 layers of epidermis fibers that are slightly woody. Cortical width Guangdong Province, a square-shaped air cavity, arranged in a ring; the endothelium is not obvious. The 3-4 columns of the calibrating tube in the center column, with the outermost vascular bundles smaller, are arranged between the gas cavities. The vascular bundles of the outer ring and the vascular bundles of the inner ring are all connected by fibers. The vascular bundles are externally flexible. There are fiber bundles around and the xylem of the primary xylem is smaller. There are 2 large-scale ducts in the xylem, the phloem cells are small, and the central pith is large and hollow.
Application identification
Both reed rhizome and kudzu root can resolve the epidemic. Natural reed rhizomes heat, Gegen strong muscle strength. The reed rhizome enters the Yangming meridian, lowers the gas and stops the vomiting, and thirst; the Puerariae enters the bladder.
Physical and chemical identification
Take this product powder 1g, add chloroform 10ml, ultrasonic treatment for 20 minutes, filtered, the filtrate as a test solution. Another reed rhizome reference drug 1g, with the legal system as a reference drug solution. According to the thin layer chromatography (Appendix VI B) test, 10 μl of each of the above two solutions was pipetted and spotted on the same silica gel G-laminate plate with sodium carboxymethyl cellulose as the binder, using petroleum ether (30-60°C). The upper layer of ethyl formate-formic acid (15:5:1) was used as a developer, developed, removed, dried, and viewed under a UV light (365 nm). In the chromatogram of the test sample, fluorescent spots of the same color were observed at positions corresponding to the chromatogram of the reference drug.
Identification of medication
The reed rhizome is the root of the reed, and the stem is the tender stem of the reed. Both are from the same plant and have similar efficacy. However, reed rhizome grows stronger than thirst, and stems grow longer than clear lung heat, with a slight emphasis. In the drug market, there is no supply of stem stalks, which can be replaced by reed rhizome.
Fine Chemical,Pharmacia Fine Chemicals,Fine Chemical Industries,Fine Chemicals And Solvents
Guangzhou ZIO Chemical Co.,Ltd. , https://www.ziofoodchemical.com