Journal
INDUSTRIAL CROPS AND PRODUCTS
Volume 45, Issue -, Pages 133-140Publisher
ELSEVIER
DOI: 10.1016/j.indcrop.2012.11.040
Keywords
Extraction; Phenolic compounds; Radical scavenging capacity; Multivariate analysis; Walnut oil
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Funding
- Council for Research at the Campus of Agriculture and Natural Resources of the University of Tehran
- Research Council of the University of Tehran
- ZamZam Corporation of Iran
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An analytical study on the fatty acids, physicochemical characteristics, phenolic compounds, tocopherol content and antioxidant activities of walnut oils extracted by different extraction methods (maceration, Mac; modified Bligh-Dyer, MBD; and cold-press, CP) was conducted. Antioxidant activity of oil was measured by 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azinobis (3-ethylbenzthiazoline sulfonate) (ABTS) radical scavenging capacity and beta-carotene bleaching assays. Results showed that fatty acid content was not influenced by extraction method. MBD method was found to be the best process for extracting oil with a favorable quality characteristics when compared to Mac and CP. Higher total phenolics content (TPC), ortho-diphenol content (ODC) and total tocopherol content (TTC) and DPPH and ABTS scavenging capacities were also obtained with MBD. According to both principal component and correlation analyses, TPC and ODC were correlated with the beta-carotene bleaching activity and TTC was correlated with the ABTS of the oils extracted by the different methods in the current study. (C) 2012 Elsevier B.V. All rights reserved.
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