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. 2023 Nov 17;9(11):e22442.
doi: 10.1016/j.heliyon.2023.e22442. eCollection 2023 Nov.

Evaluation of antioxidant activity and heavy metals content in licorice (Glycyrrhiza glabra L.) growing wild in Armenia

H R Petrosyan  1 , A A Nigaryan  1 , H A Hovhannisyan  1 , A M Soloyan  1 , V V Vardapetyan  1 , A I Martiryan  1
Affiliations

Evaluation of antioxidant activity and heavy metals content in licorice (Glycyrrhiza glabra L.) growing wild in Armenia

H R Petrosyan et al. Heliyon. .

Abstract

In this study, for the first time an analysis of the metal content in extracts obtained from licorice roots grown in the forests of five different regions in Armenia was conducted. Our findings indicated that the concentrations of metals in the extracts did not exceed the permissible limits set by regulatory standards. Furthermore, we investigated the quantitative composition of flavonoids, tannins, and anthocyanins in the licorice roots, which had not been previously studied. Our results revealed that the composition of these substances is significantly influenced by the soil characteristics of the region. To assess the antioxidant properties of the licorice extract, we employed the approach known as the kinetics of competitive reaction method. Our study successfully demonstrated that the extract derived from the roots of the licorice plant, collected from all five regions under study, exhibited notable antioxidant properties.

Keywords: Anthocyanins; Antioxidants; Flavonoids; Heavy metals; Licorice; Tannins.

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Conflict of interest statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Figures

Image 1
Graphical abstract
Fig. 1
Fig. 1
Quantitative content of tannins, anthocyanins, flavonoids in terms of dry raw materials in licorice's roots collected from five regions (Syunik, Gegharkunik, Aragatsotn, Kotayk, Tavush) of Armenia.
Fig. 2
Fig. 2
Determination of Cu, Co, Cd, Ni and Pb heavy metals in licorice's roots collected from five regions (Syunik, Gegharkunik, Aragatsotn, Kotayk, Tavush) of Armenia.
Fig. 3
Fig. 3
Absorption of PNDMA vs hydrogen peroxide radiation time at different concentrations of licorice root extract collected from (1) Syunik, (2) Gegharkunik, (3) Aragatsotn, (4) Kotayk, (5) Tavush regions. Molar concentration of the extract was a-0, b-0.02, c-0.04, d-0.10, e−0.16 g l−1.
Fig. 4
Fig. 4
Slopes of plots presented in Fig. 3 vs concentration of the extract.
See this image and copyright information in PMC

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