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Identification method of notoginseng powder


Panax notoginseng powder is the rhizome product of the plant Panax notoginseng, which is made from the main root of Panax notoginseng. Also known as Tian Qifen, gold is not exchanged. Warm in nature, sweet and slightly bitter in taste, enters the liver, stomach, and large intestine meridians. Also known as northern ginseng, southern notoginseng. Ginseng is the first to replenish qi, and Panax notoginseng is the first to replenish blood.
For a long time, Panax notoginseng has always been a traditional Chinese medicine.
The function of Panax notoginseng can be summed up in six words "stop bleeding, dissipate blood stasis, relieve pain". Therefore, Panax notoginseng has always been used as a medicine for wounds and sores, and is rarely taken as a tonic.

Contains a variety of saponins, the total amount is 9.75% to 14.90%, similar to the saponins contained in ginseng, but mainly dammarane series saponins, including ginsenosides Rb1, Rb2, Rc, Rd, Re, Rg1, Rg2, Rh1 and three Heptapenosides R1~4, R6, etc.
In addition, it still contains the hemostatic active ingredient dencichine and a small amount of flavonoids.
Physical and chemical identification
Take 2 g of coarse powder, add 15 ml of methanol, soak and shake for 1 hour, and filter. Take 1ml of the filtrate, put it on a water bath and evaporate to dryness, add 1ml of acetic anhydride and 1-2 drops of sulfuric acid, the yellow color will gradually change to red, purple, cyan, dirty green. (steroid reaction)
Take the above filtrate and drop it on the filter paper, observe it under the ultraviolet lamp (365nm) after drying, it will show light blue fluorescence. Observed, there is a strong yellow-green fluorescence. (check flavonoids)

Identification method
chemical method
(1) The powder of this product is grayish yellow. There are many starch granules, single granules are round, semicircular or round polygonal, with a diameter of 4-30 microns; compound granules are composed of 2-10 sub-grains. Resin tract fragments contain yellow discharge. The diameter of trapezoidal, reticulated and threaded conduits is 15-55 microns. Calcium oxalate cluster crystals are rare, with a diameter of 50-80 microns.
(2) Take 2 grams of powder of this product, add 15 ml of methanol, warm soak for 30 minutes (or cold soak and shake for 1 hour), and filter. Take 1 ml of the filtrate, evaporate to dryness, add 1 ml of acetic anhydride, and 1~2 drops of sulfuric acid, the yellow color will gradually change to red, purple, cyan, and dirty green; Observe under ultraviolet light (365 nanometers), it shows light blue fluorescence, add 1 drop of boric acid-saturated acetone solution and 10% citric acid solution each, after drying, observe under ultraviolet light, there is a strong yellow-green color fluorescence.
(3) Take 0.5 g of this product powder, add about 5 drops of water, stir well, then add 5 ml of water-saturated n-butanol, plug it tightly, shake for about 10 minutes, let stand for 2 hours, centrifuge, and take the supernatant, Add 3 times the amount of water saturated with n-butanol, shake well, let it stand to separate layers (centrifuge if necessary), take the n-butanol layer, put it in an evaporating dish, evaporate to dryness, add 1 ml of methanol to the residue to dissolve, and use it as the test product solution. Separately take ginsenoside Rb1, ginsenoside Re, ginsenoside Rg1 and notoginsenoside R1 reference substances, add methanol to make a mixed solution containing 1 mg per 1 ml, as the reference solution. According to the thin-layer chromatography test, draw 1 microliter of each of the above two solutions, respectively spot on the same silica gel G thin-layer plate, and use chloroform-ethyl acetate-methanol-water (15:40:22:10) at a temperature below 10°C. The solution in the lower layer is the developing agent, develop, take out, dry in the air, spray with sulfuric acid solution, and heat at 105°C until the spots are clearly colored. In the chromatogram of the test product, spots of the same color appear at the positions corresponding to the chromatogram of the reference substance; when inspected under a purple external light (365 nm), the same fluorescent spots appear.
easy way
It just depends on how many heads of Panax notoginseng are used to make the powder. Generally speaking, the powder of the bigger Panax notoginseng has a slightly higher content of active ingredients. Therefore, the quality and price of notoginseng powder is determined by the grade of the raw material notoginseng, such as 20 heads, 30 heads, etc.

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