Modification of the method of quantitative determination of flavonoids in the grass of Polýgonum aviculáre L.
- Authors: Labkovskaya M.V.1, Kurkin V.A.2, Shmygareva A.A.1
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Affiliations:
- Orenburg State Medical University
- Samara State Medical University
- Issue: Vol 24, No 2 (2024)
- Pages: 81-85
- Section: PHARMACEUTICAL CHEMISTRY, PHARMACOGNOSY
- URL: https://ogarev-online.ru/2410-3764/article/view/280520
- DOI: https://doi.org/10.35693/AVP626577
- ID: 280520
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Abstract
Aim – modification of the method of quantitative determination of total flavonoids in the raw material of Polýgonum Aviculáre L., presented in State Pharmacopoeia, XIV Ed.
Material and methods. The raw material of knotgrass (grass) was harvested near the villages of Ponomarevka, Dombarovka, Alekseevka, Orenburg region in June and July, 2022. The harvested material was dried in accordance with the requirements of the SP. The quantitative content was studied using the Vilitek VBS ultrasonic bath at a temperature of 40°C and power of 60 W, the LAB-TB-6/W water bath at a temperature of 90°C, rotary evaporator "IR-1 LT" at a temperature of 70°C. The electronic spectra were measured on the UNICO 2800 UV spectrophotometer, in 10 mm thick cuvettes in the wavelength range from 190 to 700 nm. The comparison solution was prepared using 96% ethyl alcohol concentration.
Results. The presented method of quantitative determination can be used in "end-to-end" standardization, for raw material of other types of Polýgonum Aviculáre L., as well as medicinal herbal preparations based on Polýgonum AviculáreL. We selected the extraction conditions using 50% ethyl alcohol in the ratio (raw material-extractant) of 1:50 and boiling in the water bath for 60 minutes, which allowed us to achieve the yield of total flavonoids more than 0.5% as stated in SP XIV (FS.2.5.0069.18).
Conclusion. The new conditions for the analysis of the quantitative determination of the amount of flavonoids in the grass of the Polýgonum Aviculáre L. are proposed that are different from the ones stated in the pharmacopoeia. Main differences: single extraction vs. three-stage extraction described in the pharmacopoeia; reduction of extraction time in the water bath to 60 minutes, which is 30 minutes less than in the method of SP XIV; concentration of the extractant and the ratio of "raw materials to extractant". Thus, the method of quantitative determination of the grass of the Polýgonum Aviculáre L. has been modified in the terms of basic conditions of extraction of raw materials. Based on the data obtained, the average content of flavonoids in the raw material of Polýgonum Aviculáre L. was 1.8 ± 0.08%.
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##article.viewOnOriginalSite##About the authors
Maiya V. Labkovskaya
Orenburg State Medical University
Author for correspondence.
Email: labkovskayam@bk.ru
ORCID iD: 0009-0003-8213-9945
PhD, Associate Professor of the Department of Management and Economics of Pharmacy, Pharmaceutical Technology and Pharmacognosy
Russian Federation, OrenburgVladimir A. Kurkin
Samara State Medical University
Email: kurkinvladimir@yandex.ru
ORCID iD: 0000-0002-7513-9352
PhD, Professor, Head of the Department of Pharmacognosy with Botany and the basics of Phytotherapy
Russian Federation, SamaraAnna A. Shmygareva
Orenburg State Medical University
Email: a.shmygareva@mail.ru
ORCID iD: 0000-0002-6380-5063
PhD, Associate Professor, Head of the Department of Management and Economics of Pharmacy, Pharmaceutical Technology and Pharmacognosy
Russian Federation, OrenburgReferences
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