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dc.contributor.authorSteele, Valerie J.
dc.contributor.authorStern, Ben
dc.contributor.authorStott, A.W.
dc.date.accessioned2014-03-25T16:02:44Z
dc.date.available2014-03-25T16:02:44Z
dc.date.issued2010-12-15
dc.identifier.citationSteele VJ, Stern B and Stott AW (2010) Olive oil or lard? Distinguishing plant oils from animal fats in the archaeological record of the eastern Mediterranean using gas chromatography/combustion/isotope ratio mass spectrometry. Rapid Communications in Mass Spectrometry. 24(23): 3478-3484.en_US
dc.identifier.urihttp://hdl.handle.net/10454/5863
dc.descriptionYesen_US
dc.description.abstractDistinguishing animal fats from plant oils in archaeological residues is not straightforward. Characteristic plant sterols, such as ¿-sitosterol, are often missing in archaeological samples and specific biomarkers do not exist for most plant fats. Identification is usually based on a range of characteristics such as fatty acid ratios, all of which indicate that a plant oil may be present, none of which uniquely distinguish plant oils from other fats. Degradation and dissolution during burial alter fatty acid ratios and remove short chain fatty acids, resulting in degraded plant oils with similar fatty acid profiles to other degraded fats. Compound specific stable isotope analysis of ¿13C18:0 and ¿13C16:0, carried out by gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS), has provided a means of distinguishing fish oils, dairy fats, ruminant and non-ruminant adipose fats but plant oils are rarely included in these analyses. For modern plant oils where C18:1 is abundant, ¿13C18:1 and ¿13C16:0 are usually measured. These results cannot be compared with archaeological data or other modern reference fats where ¿13C18:0 and ¿13C16:0 are measured, as C18:0 and C18:1 are formed by different processes resulting in different isotopic values. Eight samples of six modern plant oils were saponified releasing sufficient C18:0 to measure the isotopic values, which were plotted against ¿13C16:0. The isotopic values for these oils, with one exception, formed a tight cluster between ruminant and non-ruminant animal fats. This result complicates the interpretation of mixed fatty residues in geographical areas where both animal fats and plant oils were in use.en_US
dc.description.sponsorshipAHRCen_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttp://onlinelibrary.wiley.com/doi/10.1002/rcm.4790/pdfen_US
dc.rights© 2010 J. Wiley & Sons. This is the pre-peer-reviewed version of the article, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/rcm.4790/pdfen_US
dc.subjectArchaeological residuesen_US
dc.subjectOils; Animals; Archaeology; Carbon Isotopes; Analysis; Fatty Acids; Gas Chromatography-Mass Spectrometry; Instrumentation; Plant Oils; REF 2014en_US
dc.subjectFatsen_US
dc.subjectGas chromatography-combustion-isotope ratio mass (GC-C-IRMS)en_US
dc.subjectAnimal fatsen_US
dc.subjectVegetable oilsen_US
dc.subjectFish oilsen_US
dc.subjectEastern Mediterraneanen_US
dc.titleOlive oil or lard? Distinguishing plant oils from animal fats in the archaeological record of the eastern Mediterranean using gas chromatography/combustion/isotope ratio mass spectrometryen_US
dc.status.refereedYesen_US
dc.typeArticleen_US
dc.type.versionAccepted Manuscripten_US
refterms.dateFOA2018-07-19T12:39:54Z


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