Processing
Take the original herbs, remove impurities, rush to wash, run through, cut thick slices, dried or low-temperature drying, dry storage container after processing, sealed, cool and dry place, anti-mite.
Identification of raw herbs
[Character identification]:
(1) The axilla is a slightly curved root tuber, 4-13 cm long and 0.6-2.5 cm in diameter. The top of the stem marks. The surface is tan to dark brown, and the peeling surface is yellow. The internodes are shortened and form a closely bulging ring, resembling a silkworm (commonly known as a cocoon); or a section that is elongated and shaped like a bamboo (so-called bamboo knot). There are many punctiform or knob-like roots and color broken scales on the section. Lightweight, crisp, easy to break. The section is uneven, with many fissures. The skin is yellowish-brown to dark brown, oily, with brown oil spots, yellow-white woods, obvious ray, and yellow to yellow-brown pith. Gas smell, taste bitter and pungent.
(2) Cymbidium axyridis, which is cylindrical in shape, with stem and leaf sheath residues at the top, conical roots, longitudinal wrinkles, and lenticels; surface brown, with dense rings near the roots, 8-15 cm long, Diameter 1-3cm (commonly known as bar). Some rhizomes are thick, irregularly nodular, with several stem bases at the top and smaller roots (commonly known as big-headed crickets). Crisp and easy to break. The section is flat, the skin light brown, yellow and white wood. Lighter odor. With thick rhizomes, horizontal sections such as silkworms, brown surfaces, dense cross-sections, many cinnabar spots, and rich aromas are preferred.
[microscopic identification]:
Rootstock transverse section,
(1) The cocoon plug layer is more than 10 cells. Cortical Philip. The cortex is thin and the phloem is cracked. Layer formation loop. There are more xylem vessels. Most of the phloem, marrow, and ray have secretory tract, round or irregularly oblong, with a diameter of up to 200 μm, containing yellow-brown oily substances.
(2) Broad-leaf fleas are similar to alfalfa, but there are few catheters and there are pieces of wood fibers in the bundle. The pith is large. Secretory diameter to 180μm
ã€Powder characteristics】: brownish yellow.
1 The secretory cells in the longitudinal section of the secretory canal are long and thin, with thin or slightly thick walls, and there are traces of light yellow secretions and starch grains after melting; golden-yellow secretions are also present.
2 parenchyma cells long strips, often with pale yellow secretions or oil droplets.
3 Reticulate, borderline also catheter diameter 13-15μm.
4 Cork cells are filled with yellow-brown or brown objects.
[Physical and chemical identification]: take powder 0.5g, add diethyl ether appropriate amount, cold soak 1h, filtration, the filtrate was concentrated to 1ml, add 7% hydroxylamine hydrochloride methanol solution 2-3 drops, 20% potassium hydroxide ethanol solution 3 drops, in the water bath On the slightly hot, hot and cold, after cooling, plus dilute hydrochloric acid to adjust the pH to 3-4, plus 1% ferric chloride ethanol solution 1-2 drops at the ether layer interface was purple.
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