Influence of extraction techniques on physical-chemical characteristics and volatile compounds of extra virgin olive oil
| Autor: | Costantina Barbarisi, Giancarlo Cammarota, Marina Paolucci, Fausta De Cunzo, Maria Grazia Volpe, Francesco Siano |
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| Rok vydání: | 2014 |
| Předmět: |
Chemical Phenomena
Food Handling General Chemical Engineering Centrifugation Olea Ultraviolet light Plant Oils Food science Peroxide value Olive Oil Aroma Volatile Organic Compounds Chromatography Electronic nose biology Chemistry Extraction (chemistry) food and beverages General Medicine General Chemistry biology.organism_classification Polyphenol Odorants Food Analysis Olive oil |
| Zdroj: | Journal of oleo science. 63(9) |
| ISSN: | 1347-3352 |
| Popis: | The purpose of this study was to investigate three types of extraction methods of extra virgin olive oil (EVOO) from the same cultivar (Ortice olive cultivar): traditional or pressing (T) system, decanter centrifugation (DC) system and a patented horizontal axis decanter centrifugation (HADC) system. Oil samples were subjected to chemical analyses: free acidity, peroxide value, ultraviolet light absorption K232 and K270, total polyphenols, antioxidant capacity, volatile compounds and olfactory characteristics by electronic nose. The two centrifugation systems showed better free acidity and peroxides value but total polyphenol content was particularly high in extra virgin olive oil produced by patented HADC system. Same volatile substances that positively characterize the oil aroma were found in higher amount in the two centrifugation systems, although some differences have been detected between DC and HADC system, other were found in higher amount in extra virgin olive oil produced by T system. The electronic nose analysis confirmed these results, principal component analysis (PCA) and correlation matrix showed the major differences between EVOO produced by T and HADC system. Taken together the results showed that DC and HADC systems produce EVOO with better characteristics than T system and patented HADC is the best extraction system. |
| Databáze: | OpenAIRE |
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