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Effect of the Yerba mate (Ilex paraguariensis) brewing method on the content of selected elements and antioxidant potential of infusions

Janda Katarzyna, Jakubczyk Karolina, Łukomska Agnieszka, Baranowska-Bosiacka Irena, Rębacz-Maron Ewa, Dec Karolina, Kochman Joanna, Gutowska Izabela

Polish Journal of Chemical Technology

2020

Vol. 22, nr 1

54--60

Yerba mate is a source of biologically active substances. The aim was to determine whether the place of origin of Yerba and the brewing method have any influence on the levels of Ca, Mg and Fe and antioxidant activity of infusions. Samples were steeped in cold water (25o C) and hot water (three consecutive infusions with 85o C water). Infusions had a high antioxidant activity and high Mg level. The levels of elements and the antioxidant activity were influenced by the brewing method. There were no significant differences in the examined parameters depending on the country of origin. The results on the levels of elements and the antioxidant activity indicate that the most efficient brewing method was infusion in hot water. The highest levels of elements were found in first infusions, with the highest antioxidant activity in the third infusions.

Effect of extraction method on the antioxidative activity of ground elder (Aegopodium podagraria L.)

Wróblewska Agnieszka, Janda Katarzyna, Makuch Edyta, Walasek Marika, Miądlicki Piotr, Jakubczyk Karolina

Polish Journal of Chemical Technology

2019

Vol. 21, nr 3

13--18

In this work the studies on the antioxidative properties of extracts from various morphotic parts of the ground elder (leaves, rhizomes, seeds and flowers) were presented. Moreover, the effect of different extraction methods (ultrasonic assisted extractions, extraction in a Soxhlet apparatus, extraction at the boiling point of the solvent used), solvent and its amount, and extraction time on the antioxidative properties of the obtained extracts were tested. The studies showed that all parts of ground elder can show radical scavenging activity, and it depends mainly on the method of extraction and extraction time. But the most beneficial is ultrasonic assisted extraction which used lower amount of solvent (ethanol). In case of all parts of the ground elder (leaves, rhizomes, seeds and flowers) it allows to obtain very high values of the antioxidant capacity (above 90%) for very short extraction time amounted to 20–40 minutes.