Chemical identification
(1) The powder is red in the presence of alkaline solution.
(2) take the product powder 25mg, add water 50ml and hydrochloric acid 2ml, set in a water bath and heat for 15min, let cool, add ether 40ml, shake to extract, take the ether layer. Through anhydrous sodium sulfate dehydration, filtration, take filtering 5ml, evaporated to dry, let cool, add ammonia test solution 5ml, the solution was yellow or orange, set in the water bath heating 2min, turned purple. (Check crickets)
Medicinal materials based source: for the leguminous plant leaf senna or senna leaflets.
Harvesting and storage: During the growth period, pick the leaves under the sunny day, spread the sun in time, turn them frequently, and do not pile up too thick during the drying, so as to avoid yellowing of the leaf color and drying to dryness. Or use 40-50 °C temperature drying. According to the size and quality of the blade classification, packaging.
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