Rapid analysis of major components and potential authentication of South African olive oils by quantitative ¹³C nuclear magnetic resonance spectroscopy

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dc.contributor.authorMcKenzie, J. M.en_ZA
dc.contributor.authorKoch, K. R.en_ZA
dc.date.accessioned2011-05-15T15:55:16Z
dc.date.available2011-05-15T15:55:16Z
dc.date.issued2004
dc.descriptionCITATION: McKenzie, J. M. & Koch, K. R. 2004. Rapid analysis of major components and potential authentication of South African olive oils by quantitative ¹³C nuclear magnetic resonance spectroscopy. South African Journal of Science, 100(7-8):349-354.
dc.descriptionThe original publication is available at https://journals.co.za
dc.description.abstractWe have developed a rapid, quantitative ¹³C NMR spectroscopic method for the determination of the major fatty acids (oleic, linoleic and saturated acids) contained as triacylglycerides in South African extra-virgin olive oils. With the judicious use of a shiftless NMR relaxation agent, Cr(acetylacetonate)3, it is possible to determine the principal fatty acids in 0.4 g of olive oil within 20 min. This method also allows for the estimation of the distribution of the oleic and linoleic acids in the naturally occurring triacylglycerides in olive oils, expressed as α/β ratios for the triacylglycerides. Moreover, a fake product, marketed in South Africa as an 'extra-virgin olive oil', was also analysed to demonstrate the use of ¹³C NMR spectroscopy as a rapid means of establishing the authenticity of the claimed product on the local market. We further examined a selection of extra-virgin olive oils produced in various regions of the Western Cape province in 2002 and 2003, using ¹³C NMR spectroscopy, in a preliminary attempt to determine their major fatty acid compositions, and to establish whether any regional and cultivar-based differences in these products can thereby be detected.
dc.description.urihttps://journals.co.za/content/sajsci/100/7-8/EJC96277
dc.description.versionPublisher's version
dc.format.extent6 pages
dc.identifier.citationMcKenzie, J. M. & Koch, K. R. 2004. Rapid analysis of major components and potential authentication of South African olive oils by quantitative ¹³C nuclear magnetic resonance spectroscopy. South African Journal of Science, 100(7-8):349-354
dc.identifier.issn1996-7489 (online)
dc.identifier.issn0038-2353 (print)
dc.identifier.urihttp://hdl.handle.net/10019.1/9681
dc.language.isoen_ZAen_ZA
dc.publisherAcademy of Science for South Africa
dc.rights.holderAcademy of Science for South Africa
dc.subjectOlive oil
dc.subjectFatty acids
dc.titleRapid analysis of major components and potential authentication of South African olive oils by quantitative ¹³C nuclear magnetic resonance spectroscopyen_ZA
dc.typeArticle
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