Phenolic composition and antioxidant activity of industrial cork by-products
authors Santos, SAO; Villaverde, JJ; Sousa, AF; Coelho, JFJ; Neto, CP; Silvestre, AJD
nationality International
journal INDUSTRIAL CROPS AND PRODUCTS
author keywords Quercus suber L.; cork; cork powder; black condensate; phenolic compounds; antioxidant activity
keywords QUERCUS-SUBER L.; MASS-SPECTROMETRY; REPRODUCTION CORK; EXTRACTS; BIOPOLYESTERS; VARIABILITY; COMPONENTS; POWDER; BARK; MS
abstract The phenolic composition of cork powder and black condensate, two by-products from the cork industry, was investigated by the first time using high-performance liquid chromatography-multi-stage mass spectrometry (HPLC-MSn). The same methodology of extraction was applied to cork, for comparative purposes. Eighteen phenolic compounds were identified in cork, five of them are reported for the first time as its constituents. Sixteen and thirteen phenolic compounds were identified as cork powder and black condensate components, respectively, with only one compound of each residue published before as its constituent. The antioxidant activity of the extracts was evaluated, being, to our knowledge, the first study concerning the antioxidant activity of these cork residues. The extracts present an antioxidant activity higher than BHT, with black condensate showing the lowest IC50 value. These results, together with the phenolic content values, demonstrate the high potential of these residues as source of high value compounds. (C) 2013 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0926-6690
year published 2013
volume 47
beginning page 262
ending page 269
digital object identifier (doi) 10.1016/j.indcrop.2013.03.015
web of science category Agricultural Engineering; Agronomy
subject category Agriculture
unique article identifier WOS:000319892000037
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journal impact factor 4.244
5 year journal impact factor 4.583
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