Authenticity Assessment of Extra Virgin Olive Oil: Evaluation of Desmethylsterols and Triterpene Dialcohols

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• 作者：Cynthia T. Srigley ; Carolyn J. Oles…
• 关键词：Adulteration ; Authenticity ; Desmethylsterol ; Erythrodiol ; Extra virgin olive oil ; Gas chromatography ; Purity ; Sterol ; Triterpene dialcohol ; Uvaol
• 刊名：Journal of the American Oil Chemists' Society
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：93
• 期：2
• 页码：171-181
• 全文大小：2,097 KB
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• 作者单位：Cynthia T. Srigley (1)
  Carolyn J. Oles (1)
  Ali Reza Fardin Kia (1)
  Magdi M. Mossoba (1)
  
  1. Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, 5100 Paint Branch Parkway, College Park, MD, 20740, USA
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Industrial Chemistry and Chemical Engineering
  Analytical Chemistry
  Chemistry
  Biotechnology
  Biomaterials
  Agriculture
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1558-9331

文摘

Extra virgin olive oil (EVOO) has a long history of economic adulteration, the detection of which presents significant challenges due to the diverse composition of cultivars grown around the world and the limitations of existing methods for detecting adulteration. In this study, using Method COI/T.20/Doc. No. 30/Rev. 1 of the International Olive Council, the authenticity of 88 market samples of EVOO was evaluated by comparing total sterol contents, desmethylsterol composition, and contents of triterpene dialcohols (erythrodiol and uvaol) with purity criteria specified in the United States Standards for grades of olive oil and olive-pomace oil. Three of the 88 samples labeled as EVOO failed to meet purity criteria, indicating possible adulteration with commodity oil and/or solvent-extracted olive oil. Detection of adulteration was also evaluated by spiking an EVOO sample with commodity oil at the 10 % level. As expected, eight of the spiked samples (canola, corn, hazelnut, peanut, safflower, soybean, and sunflower oils, and palm olein) failed to meet purity criteria. Two of the three samples spiked with 10 % hazelnut oil went undetected for adulteration. Overall, a low occurrence rate of adulteration (<5 %), based on purity criteria for desmethylsterols and triterpene dialcohols, was detected for the 88 products labeled as EVOO. Keywords Adulteration Authenticity Desmethylsterol Erythrodiol Extra virgin olive oil Gas chromatography Purity Sterol Triterpene dialcohol Uvaol