WPŁYW CZASU I TEMPERATURY PARZENIA SUSZONYCH LIŚCI MNISZKA LEKARSKIEGO (Taraxacum officinale F.H. Wiggers coll.) NA ZAWARTOŚĆ ZWIĄZKÓW ANTYOKSYDACYJNYCH W NAPARACH

Kałwa Klaudia; Kamil Wilczyński

doi:10.24326/aspta.2017.3-4.1

Vol. 16 No. 3-4 (2017)

Artykuły

EFFECT OF TIME AND INFUSION TEMPERATURE DRIED LEAVES DANDELION (Taraxacum officinale F.H. Wiggers coll.) ON THE CONTENT OF ANTIOXIDANT COMPOUNDS

Kałwa Klaudia⁺⁻
Kamil Wilczyński⁺⁻

pdf (Język Polski)

DOI: https://doi.org/10.24326/aspta.2017.3-4.1
Submitted: April 16, 2019
Published: 2017-12-16

Abstract

The aim of the study was to determine the content of polyphenolic compounds, including flavonoids in infusions of dandelion leaves (Taraxacum officinale) depending on the time and the temperature of infusion and determination of antioxidant activity for the infusions tested. Samples of dried dandelion leaves about the weight of 2 g (±0.0001 g) were filled with deionized water (100 ml) at an initial temperature of 100°C, 80°C and 50°C. Determination of polyphenol content was carried out using Folin−Ciocalteu reagent. The flavonoid content expressed as epicatechin was determined spectrophotometrically. Antioxidant activity was determined using synthetic DPPH radical. It was found that the content of polyphenols expressed as gallic acid ranges between 14.18 mg/100 ml ± 0.07 and 37.52 mg/100 ml ± 0.04 depended on the initial temperature and infusion time. A similar relationship was found when the flavonoid content were within the range from 9.61 mg/100 ml ± 0.02 to 25.26 mg/100 ml ± 0.2. The ability to reduce the DPPH antioxidant radical ranged from 38.24% to 62.05%. The results confirm the high dependency of the content of phenolic
compounds in the infusions of dandelion leaves on the time and temperature of infusion.

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