Identification of phenolic compounds and development of a method for quantitative determination of the amount of phenolcarboxylic acids in the herb of Phacelia Tanacetifolia benth.


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Abstract

Relevance. Modern requirements to the quality of medicinal herbal raw materials (herbs) include the assessment of the content of active substances. Development of the method of quantitative determination of the amount of active substances is one of the stages of standardization of a new type of herbal plants.

The aim of the study is to identify phenolic compounds and to develop a method of quantitative determination of the sum of phenolcarboxylic acids as a dominant group of biologically active substances in the herb of phacelia tanacetifolia.

Material and methods. The object of research was a herb of phacelia tanacetifolia, grown in territory of Republic Dagestan in vicinities of Kaspiysk. The herb was collected during flowering in April, 2022 and dried by air-shadowing method. Phenolic compounds were studied by thin-layer chromatography on chromatographic plates "Sorbfil PTSH-P-A" (Russia, 10*15). Identification was performed in the presence of standard samples. The plates were viewed in UV light before and after treatment with 2% alcohol solution of aluminum chloride. The sum of phenolcarboxylic acids was determined by direct spectrophotometry.

Results. Phenolcarboxylic acids (chlorogenic and caffeic acids) and flavonoids (rutin and quercetin) were identified in phacelia herb. In the course of the study the optimum conditions of extraction under which the maximum yield of the sum of phenolcarboxylic acids is observed were established. The obtained spectrum of alcoholic extraction from phacelia herb had maximum absorption at wave length 330 nm that corresponds to the absorption maximum of standard sample of chlorogenic acid.

Conclusions. The presence of phenolcarboxylic acids (chlorogenic and caffeic acids) and flavonoids (rutin and quercetin) in phacelia herb has been established by the thin-layer chromatography method. The methods of quantitative determination of the sum of phenolcarboxylic acids in 70% alcohol extract of the herb of phacelia tanacetifolia recalculated to chlorogenic acid have been developed.

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About the authors

P. A. Sheykhmagomedova

Pyatigorsk Medical and Pharmaceutical Institute – Branch of FSBEI HE VolgGMU of the Ministry of Health of the Russian Federation

Author for correspondence.
Email: Patya16101998@yandex.ru

Post-gradient Student, Department of Pharmacognosy, Botany and Phytopreparation Technology

Russian Federation, Pyatigorsk

O. I. Popova

Pyatigorsk Medical and Pharmaceutical Institute – Branch of FSBEI HE VolgGMU of the Ministry of Health of the Russian Federation

Email: Patya16101998@yandex.ru

Dr.Sc. (Pharm.), Professor, Department of Pharmacognosy, Botany and Phytopreparation Technology

Russian Federation, Pyatigorsk

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Supplementary files

Supplementary Files
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1. JATS XML
2. Figure 1. Spectrum of water-alcohol extract from the herb Phacelia tansy

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