Research on the development of quality indicators for the plant raw material of Persicaria lapathifolia (L.) Delarbre herb сollected in the сonditions of the Professor Boris M. Kozo-Polyansky Botanical Garden

Introduction. One of the important directions in the development of modern pharmacognosy is the study of representatives of domestic flora in the search for additional plant species that are promising for use in medical practice. Such a plant is Persicaria lapathifolia (L.) Delarbre, from the buckwheat family (Polygonaceae Juss.). The wide range of activities of Persicaria lapathifolia (L.) Delarbre is explained by the diversity of the plant's chemical composition, which demonstrates the potential of Persicaria lapathifolia (L.) Delarbre herba as a plant substance for the further development of medicinal herbal preparations based on it.

Aim. To develop criteria for assessing the quality of Persicaria lapathifolia (L.) Delarbre herba to create a draft regulatory document for the new type of plant raw material «Persicaria lapathifolia (L.) Delarbre herba».

Materials and methods. The study involved samples of Persicaria lapathifolia (L.) Delarbre herb collected from 2020 to 2024 in the territory of the Boris M. Kozo-Polyansky Botanical Garden of VSU. Tests aimed at developing quality indicators for thestudied plant raw material were carried out according to the methods presented in the XIV and XV editions of the State Pharmacopoeia of the Russian Federation.

Results and discussion. As a result of the conducted study, diagnostic features were identified that allow for a high degree of reliability in establishing the authenticity of Persicaria lapathifolia (L.) Delarbre herba. Criteria for assessing the quality of the plant raw material «Persicaria lapathifolia (L.) Delarbre herba» were proposed: the content of total flavonoids calculated as rutin – not less than 1.5 %; extractive substances extracted with 50 % ethanol – not less than 15 %; extractive substances extracted with water – not less than 15 %. The recommended shelf life of the plant raw material is 2 years.

Conclusion. Criteria for assessing the quality of a new type of plant raw material «Persicaria lapathifolia (L.) Delarbre herba» were proposed. The experimental data obtained in the course of the study were used in the development of instructions for collecting and drying Persicaria lapathifolia (L.) Delarbre, which have been implemented in the scientific and production activities of the Botanical Garden named after Professor Boris M. Kozo-Polyansky of Voronezh State University.

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