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Total antioxidant and radical scavenging capacities for different medicinal herbs

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Ştef D. S., Gergen I., Traşcã T. I., Monica Hãrmãnescu, Ştef Lavinia, Biron Ramona, M. G. Hegheduş

Editorial: Romanian Biotechnological Letters, 14(5), p.470-471, 2009.

Rezumat:

In this study, a total of eleven medicinal herbs (Rhamnus frangula, Echinaceae herba,
Phoeniculus, Malva silvestris, Crataegus monogyna, Taraxacum officinale, Plantago major,
Artemisia absinthium, Epilobium montanum, Chelidonium majus, Melissae Folium) from the local
market were analyzed for total antioxidant and scavenging capacities. Total antioxidant capacity was
analyzed using FRAP method (Benzie&Strain, 1996) and total scavenging capacity by DPPH method
(Burits&Bucar, 2000; Cuendet et all, 1997). The results obtained for total antioxidant capacities
varied between 23.25 – 265.5 mM Fe2+/L for FRAP method and for radical scavenging capacity
between 2.87 – 140.19 % for DPPH method. The highest TACFRAP and TACDPPH values were obtained
for Rhamnus frangula (5,19 mM/L) and Echinaceae herba (23,43%). The lower TACFRAP and
TACDPPH values were identified for tomatoes Malva silvestris extract (0,75 mM/L and 7,32%). The
good correlation between the two methods of the characterization of antioxidant capacity (FRAP and
DPPH) suggest that the antioxidant compounds from analyzed medicinal herbs present both reducing
power and radical scavenging capacity.

Cuvinte cheie: antioxidant capacities, FRAP method, DPPH method, medicinal herbs