Physical and chemical identification
1. Take a sample of coarse powder 10g, use a 0.5% ethanol solution of hydrochloric acid 70ml, reflux for 10 minutes, and filter. Take 2ml of filtrate and ferric chloride solution 1 drop, which is green. (Check phenolic ingredients)
2. The above filtrate was neutralized with ammonia solution and evaporated to dryness. The residue was dissolved with a small amount of 5% sulfuric acid and divided into two portions. One was added with 1 drop of silicotungstic acid reagent, and the precipitate was pale yellow and the other was iodized. A drop of potassium reagent, orange orange precipitation. (check alkaloids)
3, thin layer chromatography sample preparation: Take a sample of coarse powder 10g, with shaking three times with methanol extraction, combined extract, reduced to a small amount of decompression, for sample use. Use rutin control. Adsorbent: Silicone G, wet-plated. Developing agent: n-butanol-acetic acid-water (4:1:5 upper layer). Exhibition distance: 10.5cm. Developer: ammonia vapor, yellow spots.
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