Unqualified herbs identification

Herbal identification

【Characteristic identification】

1. Uncaria: The stem is cylindrical or quasi-cylindrical and has a diameter of 2-6mm. The surface is reddish-brown to purple-brown or tan, with fine vertical lines and no hair. The stalk has a slightly protruding part, opposite the two downwardly curved hooks or hooks on only one side, the hook length 1-2cm, shaped like a boat shop, apex acuminate, base slightly rounded. On the branches of the base of the hook, pits and annular stipules were observed on the petiole. Lightweight and hard. The outer layer is brownish red and the pith is light brown or yellowish. Gas slightly, tasteless.

2. Huagou rattan: stem branch square, with four corners, diameter 2-5mm. The surface is yellow-green or yellow-brown. Hook length 1.3-2.8cm, curved and growing hook shape. Hook basal branches often have semi-circular inversion or non-inverted stipules, flattened base. Lightweight, loose quality. The white section of the pulp.

3. The large-leaved cane branches are cylindrical and have deep longitudinal grooves on both sides, 2-5mm in diameter. Surface gray brown to light brown, brown hair, especially in the joints and hook end obvious. The length of the hook is 1.7-3.5cm. The inward deep curve is a semicircle and the end is expanded into a small ball. The section of the pulp is usually hollow, with occasional marrow. All are good quality, reddish brown or brown, hooked is better.

[Microscopic identification]

Stem cross section:

(1)<Underground round. The ratio of cortex, phloem and wood is about 1:1:3. One epidermal cell line, slightly curved outer cuticle. Cortical parenchyma cells contain brown inclusions. The pleated sheath fibers are arranged in intermittent loops. The phloem fibers are scattered individually or in groups and are smaller than the pleated sheath fibers and are micro-wooded. The xylem catheter constants are radially connected, and cortical and phloem parenchyma cells contain calcium oxalate crystals and a few clusters of crystals. This product is a parenchyma cell containing starch granules with a single particle diameter of about 4 μm. The complex granules consist of 2-6 granules with a diameter of about 7 μm.

(2) The ratio of the four prisms, cortex, phloem and xylem of Huagouteng is 1:2:1:2.4. Epidermal cells with a slightly elevated stratum corneum.

(3) The large-leaf uncaria is square, with concave protrusions on the two sides. The ratio of cortex, phloem and xylem was 1:1:3.7. Epidermis with finely keratinous texture, single cell non-glandular hairs. 50-65μm long. Surface with verrucous projections; multicellular nonglandular hairs, 70-875μm long, often with spiral texture. The hollow part of the pith.

Physical and chemical identification

Thin-layer chromatography: 1 g of powder of this product was infiltrated with concentrated ammonia, extracted with benzene, and the solvent was recovered. The residue was dissolved with benzene-ethyl acetate (2:5) as a test solution. Rhizoma rhynchophylline, isorhynchophylline, irrigantine, and samagua base reference substance were prepared with absolute ethanol as a control solution containing 0.2 mg/ml solution. The test solution and the control solution were pipetted onto the same high-performance thin-layer plate (HSGF 254 plate) and developed with cyclohexane-ether-methanol-ethyl acetate (8:1:1:0.1) and dried. Observed under UV, the sample chromatogram showed the same dark brown spots at the corresponding positions of the reference substance.

[Drug application identification]

Uncaria and <Chrysanthemum two drugs can both Pinggan and Shuxie Fengfeng evil, for the liver on the wind and fire on the headache and dizziness and wind-heat exogenous headache and red eyes, often used by Wu. However, the uncharted tends to stop the wind, and the chrysanthemum tends to escape the wind and heat.

Product specifications

The goods are divided into four levels.

Level 1: Flat hooks without wood hooks, ruddy color.

Grade 2: The color is slightly lower than the grade, containing less than 5% of the stem.

Grade 3: Within 10% of stems, more than the same level. With stems less than 20%, more than the same level.

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