THE DEVELOPMENT OF METHOD OF QUANTITATIVE DETERMINATION OF TOTAL FLAVONOIDS IN THE FLOWERS OF CRATAEGUS SUBMOLLIS SARG.
Abstract
The flowers and fruits of various species of the hawthorn genus (Crataegus L.) are widely used in domestic and foreign medical practice as cardiotonic preparations. In our opinion, Crataegus submolls Sarg. is a perspective species for collection of the raw materials. Crataegus submolls Sarg. is successfully cultivated in the Russian Federation and is distinguished by its rapid growth and high yield compared with wild-growing species. Moreover, the fresh fruits of Crataegus submolls Sarg. are used in nutrition.
The flowers of Crataegus submollis Sarg. contain flavonoids, among of which, like in the case of Hawthorn blood-red the hyperoside is present. It was determined that the maximum of the absorption curve of the solution of Crataegus submollis Sarg. flowers with a solution of aluminum chloride is 412 nm. The method of quantitative determination by the differential spectrophotometry of the total flavonoids calculated on hyperoside in the Crataegus submollis Sarg. flowers has been developed. It was established that the appropriate extragent for this raw material is 70% ethanol. The level of total flavonoid in Crataegus submollis Sarg. flowers has been studied. It was established that separate parts of Crataegus submollis Sarg. flowers differ markedly in the content of total flavonoids and their specific weight in raw materials. It was established that the content of total flavonoids calculated on hyperoside is varied from 2.05±0.08% tо 3.00±0.12%. It was determined that the content of total flavonoids calculated on hyperoside in different parts of hawthorn flowers ranges from 0.98% (receptacle and calyx) to 4.53% (petals). In our opinion, Crataegus submollis Sarg. flowers are the promising type of medicinal plant raw materials.
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