Evaluation of the antioxidant activity of the leaves of acerola, guabiroba and ora-pro-nobis
The objective of this work was to quantify the total content of phenolic compounds and the antioxidant activity of ethanolic extracts of acerola, guabiroba and ora-pro-nobis leaves. The analysis was performed by the DPPH free-radical method, aiming to find plants with potential use as natural antiox...
| Principais autores: | Vieira, Denise Alves, Santos, Pauline Sambugaro, Haminiuk, Charles Windson Isidoro, Plata-Oviedo, Manuel Salvador Vicente |
|---|---|
| Formato: | Artigo |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná (UTFPR)
2010
|
| Acesso em linha: |
http://periodicos.utfpr.edu.br/rebrapa/article/view/3335 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: |
The objective of this work was to quantify the total content of phenolic compounds and the antioxidant activity of ethanolic extracts of acerola, guabiroba and ora-pro-nobis leaves. The analysis was performed by the DPPH free-radical method, aiming to find plants with potential use as natural antioxidants in foodstuff. In the extraction of phenolic compounds from leaves, acidified methanol 80% showed superior performance when compared to ethanol 80%. It was found the amounts of 1656.66, 5196.66 and 1693.33 mg GAE (gallic acid equivalent)/100 g for acerola, guabiroba and ora-pro-nobis leaves, respectively. Ethanolic extracts of guabiroba and ora-pro-nobis leaves (8.57 µg GAE/mL) presented higher antioxidant activity (92.6 and 92.76%, respectively) than BHT (10.13%), ascorbic acid (19.25%) and similar to trolox (92.79%). The extract of ora-pro-nobis presented the lowest IC50 (3.22 μg GAE/mL) showing a good ability to capture the DPPH radical. DOI: http://dx.doi.org/10.14685/rebrapa.v1i2.29 |
|---|