Content of selected biologically active compounds in tea infusions of widely used European medicinal plants
2010
Dadakova, E.,Jihoceska Univ., Ceske Budejovice (Czech Republic). Zemedelska Fakulta | Vrchotova, N.,Akademie Ved, Ceske Budejovice (Czech Republic). Ustav Systemove Biologie a Ekologie | Triska, J.,Akademie Ved, Ceske Budejovice (Czech Republic). Ustav Systemove Biologie a Ekologie
Melissa officinalis, Agrimonia eupatoria, Sambucus nigra, Achillea millefolium, Filipendula ulmaria, Betula pendula and Glechoma hederacea were selected as common European medicinal herbs and sources for tea infusion preparations. Quercetin, rutin, catechin, chlorogenic acid, and squalene were determined in the prepared infusions. Free quercetin was not found in any of the infusions, but tea infusions did contain rutin and other quercetin glycosides, the content of which was, after acid hydrolysis, determined as quercetin. The highest levels of total quercetin were found in infusions from Filipendula ulmaria and Sambucus nigra (120 and 108 mg/L, respectively), rutin concentrations in these two infusions were 25.2 and 194 mg/L, respectively. The Sambucus nigra infusion contained the largest concentration of chlorogenic acid (166 mg/L). Infusions from Melissa officinalis, Agrimonia eupatoria, Betula pendula and Glechoma hederacea contained only small amounts of squalene.
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