Quantification of Phenolic Constituents and Antioxidant Activity of Pterodon Emarginatus Vogel Seeds

Overview

Journal Int J Mol Sci

Publisher MDPI

Specialties Biochemistry
Chemistry
Molecular Biology

Date 2009 Mar 28

PMID 19325773

Citations 8

Authors

Rafael C Dutra

Magda N Leite

Nadia R Barbosa

Affiliations

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Abstract

In the present study the phenolic (Folin-Dennis) and flavonoid (colorimetric assay) constituents and the antioxidant activity of Pterodon emarginatus seeds were investigated in several samples prepared with different extraction procedures: essential oil (EO) using a Clevenger-type apparatus; hexanic (HF), ethyl acetate (EAF), buthanolic (BF) and methanolic (MF) fractions using Soxhlet extraction, and extracts (1 g/extract) obtained from different methods: reflux 80 degrees C/30 min, ultrasound/30 min, static maceration/48 h and heating plate 100 degrees C/45 min. These extracts were prepared using water or ethanol/water at 30:70 v/v, 50:50 v/v or 70:30 v/v. Antioxidant activity [2,2-diphenyl-2-picrylhydrazyl hydrate (DPPH)] was tested only in the fractions obtained from Soxhlet extraction. The extract obtained from reflux using ethanol/water (70:30, v/v) showed the highest phenolic constituents level. The EAF, BF and MF showed DPPH scavenging activities with IC(50)=163.22, 18.89 and 10.15 microg/ml, respectively.

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