Quantitative measurement of the total phenolic compounds and flavonoids in Highbush Blueberry leaves
- Authors: Schastnaya A.V.1, Mushkina V.V.1
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Affiliations:
- Belarusian State Medical University
- Issue: Vol 25, No 4 (2025)
- Pages: 72-79
- Section: PHARMACEUTICAL CHEMISTRY, PHARMACOGNOSY
- URL: https://ogarev-online.ru/2410-3764/article/view/363646
- DOI: https://doi.org/10.35693/AVP695016
- ID: 363646
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Abstract
Aim – develop methods for the quantitative measurement of total phenolic compounds and flavonoids in highbush blueberry leaves.
Material and methods. Dried and crushed highbush blueberry (Vaccinium corymbosum L.) leaf samples were used in the study. Total phenolic compounds and flavonoids, expressed as hyperoside, were determined spectrophotometrically using Folin - Ciocalteu (phosphomolybdenum tungsten reagent) and an alcoholic aluminum chloride solution, respectively. Measurements were performed in five independent replicates on a single raw material sample. Optical density was measured using a Solar PB2201 spectrophotometer.
Results. The optimal parameters for the extraction of total phenolic compounds and flavonoids from highbush blueberry leaves were selected: extractant – 60% ethyl alcohol, extraction time – 50 minutes, raw “material:extractant” ratio – 1:100, grinding degree – 355 μm. The optimal factors for the chemical reactions of the interaction of phenolic compounds with the Folin-Ciocalteu reagent (reaction time – 50 minutes, sodium carbonate concentration – 5%, amount of added reagent – 0.5 ml), flavonoids with an alcoholic solution of aluminum chloride (reaction time – 50 minutes, reagent volume – 2 ml) are presented. Methods for the quantitative determination of the total phenolic compounds and flavonoids calculated as hyperoside in highbush blueberry leaves by spectrophotometry were developed and validated. The relative error at 95% confidence level for the quantitative determination of total phenolic compounds was 1.90%, and total flavonoids was 3.24%. The average phenolic content in highbush blueberry leaves was 20.45%, while the flavonoid content was 1.93%.
Conclusion. Optimal conditions for extracting total phenolic compounds and flavonoids from highbush blueberry leaves were selected. Methods for quantitatively determining the total phenolic compounds and flavonoids expressed as hyperoside in highbush blueberry leaves were developed and validated.
About the authors
A. V. Schastnaya
Belarusian State Medical University
Author for correspondence.
Email: anna.schastnaya.schastnaya@mail.ru
ORCID iD: 0009-0000-4599-1467
assistant of the Department of pharmacy organization with a course for advanced training and retraining
Belarus, MinskV. V. Mushkina
Belarusian State Medical University
Email: olga7081@tut.by
ORCID iD: 0000-0002-3397-1220
Cand. Sci. (Pharmacy), Associate professor, Head of the Department of Pharmacy Organization
Belarus, MinskReferences
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