Summary: Take 3g of this product powder, add 40ml of ethanol, soak overnight, heat and reflux for 6h, filter, add 6ml of 6mo1/L hydrochloric acid solution to the filtrate, heat and reflux for 3h, evaporate to dryness, and dissolve the residue with 40ml of ethanol as the test solution.

In addition, the reference substance of dongbiruo vinegar was added with ethanol to make it containing 0. 25 mg 1 ml was used as reference solution.

According to the thin-layer chromatography test (Appendix VIB), three samples of the above two solutions were collected and spotted on the same silica gel G thin-layer plate, and cyclohexane-chloroform-acetic acid-ethyl acetate-formic acid (6: 10:7: 1.2) was used as the developing agent.

Unfold, taking out, air dry, and inspecting under ultraviolet light (365nm). In the chromatogram of the test sample, the same bright blue fluorescent spots appear in the position corresponding to the chromatogram of the control sample.

Extracts: determined by the hot dip method under the alcohol-soluble extractives determination method (Appendix XA), with ethanol as the solvent, not less than 3.0%.

Ding Gongteng is another name for Heather. A compendium of materia medica. Heather wrote Materia Medica. Also known as Nanteng, Rock Climbing Incense and Ding Gongteng. Distributed in Hubei, Hunan, Guangdong and Sichuan.