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Journal of the American Oil Chemists' Society

, Volume 93, Issue 9, pp 1265–1273 | Cite as

The Chemical Properties and Volatile Compounds of Virgin Olive Oil from Oueslati Variety: Influence of Maturity Stages in Olives

  • Youssef OuniEmail author
  • Guido Flamini
  • Mokhtar Zarrouk
Original Paper

Abstract

The aim of the present work was to investigate the influence of fruit ripening on oil quality and volatile compounds in an attempt to establish an optimum harvesting time for Oueslati olives, the minor olive variety cultivated in Tunisia. Our results showed that many analytical parameters, i.e., peroxide value, UV absorbance at 232–270 nm, chlorophyll pigments, carotenoids and oleic acid contents decreased during ripening, whilst linolenic acid increased. Free acidity remained practically stable with a very slight rise at the highest maturity index. The volatile compounds emitted by the Oueslati olive oil were characterized and quantified by HS-SPME-GC-EIMS. Twenty-three volatile compounds were identified, mainly aldehydes, sesquiterpenes and esters. The results show variations in the volatile fractions and quality parameters of Oueslati extra virgin olive oil obtained at different olive-ripening stages. Fifteen sesquiterpenes were identified for the first time in this cultivar, mainly hydrocarbon derivatives, but also oxygenated ones. On the basis of the quality parameters and volatile fractions studied, the best stage of Oueslati olive fruits for oil processing seems to be at ripeness index about 3.0. Indeed, these results suggested the possibility of using sesquiterpenes for olive authenticity and traceability and demonstrated that the volatile fractions can be used as indicators of the degree of ripening of the olives used to obtain the corresponding virgin olive oils.

Keywords

Virgin olive oil Quality parameters Chemometrics analysis Ripening Volatile compounds HS-SPME-GC-EIMS 

Notes

Acknowledgments

This work had been done as a part of a National Research Project. We thank the Ministry of Higher Education, Scientific Research and Technology for financially supporting this program. This work was supported by our Ministry of High Education, Scientific Research and Technology. Part of this work was carried out the Dipartimento di Farmacia, University of Pisa, Italy. The authors gratefully acknowledge the personnel of the Laboratories.

References

  1. 1.
    Scheidel A, Krausmann F (2011) Diet, trade and land use: a socio-ecological analysis of the transformation of the olive oil system. Land Policy 28:47–56CrossRefGoogle Scholar
  2. 2.
    Rotondi A, Alfei B, Magli M, Pannelli G (2010) Influence of genetic matrix and crop year on chemical and sensory profiles of Italian monovarietal extra-virgin olive oils. J Sci Food Agric 90:2641–2648CrossRefGoogle Scholar
  3. 3.
    Kalua CM, Allen MS, Bedgood DR, Bishop AG, Prenzler PD, Robards K (2007) Olive oil volatile compounds, flavour development and quality: a critical review. Food Chem 100:273–286CrossRefGoogle Scholar
  4. 4.
    Jimenez Herrera B, Rivas Velasco A, Sanchez-Ortiz A, Lorenzo Tovar ML, Ubeda Muñoz M, Callejon R (2012) Influencia del proceso de maduración del fruto en la calidad sensorial de aceites de oliva virgen de las variedades Picual, Hojiblanca y Picudo. Grasa Aceite 63:403–410CrossRefGoogle Scholar
  5. 5.
    Cerretani L, Salvador MD, Bendini A, Fregapane G (2008) Relationship between sensory evaluation performed by Italian and Spanish official panels and volatile and phenolic profiles of virgin olive oils. Chemosens Percept 1(4):258–267CrossRefGoogle Scholar
  6. 6.
    Angerosa F, D’Alessandro N, Basti C, Vito R (1998) Biogeneration of volatile compounds in virgin olive oil: their evolution in relation to malaxation time. J Agric Food Chem 46(8):2940–2944CrossRefGoogle Scholar
  7. 7.
    Reboredo-Rodríguez P, Gonzáles-Barreiro C, Cancho-Grande B, Simal-Gándara J (2012) Dynamic headspace/GC–MS to control the aroma fingerprint of extra-virgin olive oil from the same and different olive varieties. Food Control 25:684–695CrossRefGoogle Scholar
  8. 8.
    Reboredo-Rodríguez P, Gonzáles-Barreiro C, Cancho-Grande B, Simal-Gándara J (2013) Effects of sedimentation plus racking process in the extra virgin olive oil aroma fingerprint obtained by DHS–TD/GC–MS. Food Bioprocess Technol 6(2013):1290–1301CrossRefGoogle Scholar
  9. 9.
    Ouni Y, Flamini G, Nabil BY, Guerfel M, Zarrouk M (2011) Volatile compounds and compositional quality of virgin olive oil from Oueslati variety: influence of geographical origin. Food Chem 124:1770–1776CrossRefGoogle Scholar
  10. 10.
    Youssef O, Flamini G, Guerfel M, Ben Youssef N, Douja D, Mokhtar Z (2011) The compositional quality and volatile compounds of samples from the blend of monovarietal olive oils cultivated in Tunisia. Int J Food Sci Technol 46:678–686CrossRefGoogle Scholar
  11. 11.
    Hermoso M, Uceda M, García A, Morales B, Frias ML, Fernández A (1991) Elaboración de aceite de calidad; Consejeria de Agricultura y pesca, Serie Apuntes 5/92. Sevilla, SpainGoogle Scholar
  12. 12.
    Minguez-Mosquera MI, Rejano L, Gandul B, Sanchez AH, Garrido J (1991) Color-pigment correlation in virgin olive oil. J Am Oil Chem Soc 68:332–336CrossRefGoogle Scholar
  13. 13.
    Ranalli A, De Mattia G, Patumi M, Proietti P (1999) Quality of virgin olive oil as influenced by origin area. Grasa Aceite 50(4):249–259CrossRefGoogle Scholar
  14. 14.
    Campeol E, Flamini G, Chericoni S, Catalano S, Cremonini R (2001) Volatile compounds from three cultivars of Olea europea from Italy. J Agric Food Chem 49:5409–5411CrossRefGoogle Scholar
  15. 15.
    Massada Y (1976) Analysis of essential oils by gas chromatography and mass spectrometry. Wiley, New YorkGoogle Scholar
  16. 16.
    Jennings W, Shibamoto T (1980) Qualitative analysis of flavor and fragrance volatiles by glass capillary chromatography. Academic, New YorkGoogle Scholar
  17. 17.
    Swigar AA, Silverstein RM (1981) Monoterpenes. Aldrich Chem, MilwaukeeGoogle Scholar
  18. 18.
    Davies NW (1990) Gas chromatographic retention indexes of monoterpenes and sesquiterpenes on methyl silicone and carbowax 20 M phases. J Chromatogr 503:1–24CrossRefGoogle Scholar
  19. 19.
    Adams RP (2007) Identification of essential oil components by gas chromatography mass spectroscopy, 4th edn. Allured Publishing Corporation, Carol StreamGoogle Scholar
  20. 20.
    Baccouri O, Bendini A, Cerretani L, Guerfel M, Baccouri B, Lercker G, Zarrouk M, Miled DDB (2008) Comparative study on volatile compounds from Tunisian and Sicilian monovarietal virgin olive oils. Food Chem 111(2):322–328CrossRefGoogle Scholar
  21. 21.
    Gutierrez F, Jim´enez B, Ruız A, Albi MA (1999) Effect of olive ripeness on the oxidative stability of virgin olive oil extracted from the varieties Picual and Hojiblanca and on the different components involved. J Agric Food Chem 47:121–127CrossRefGoogle Scholar
  22. 22.
    Bendini A, Cerretani L, Carrasco-Pancorbo A, Gómez-Caravaca AM, SeguraCarretero A, Fernández-Gutiérrez A (2007) Phenolic molecules in virgin olive oils: a survey of their sensory properties, health effects. Antioxidant activity and analytical methods. An overview of the last decade. Molecules 12:1679–1719CrossRefGoogle Scholar
  23. 23.
    Servili M, Selvaggini S, Esposto A, Taticchi G, Montedoro GF, Morozzi G (2004) Health and sensory properties of virgin olive oil hydrophilic phenols: agronomic and technological aspects of production that affect their occurence in the oil. J Chromatogr A 1054:113–127CrossRefGoogle Scholar
  24. 24.
    Gomez-Rico A, Salvador MD, La Greca M, Fregapane G (2006) Phenolic and volatile compounds of extra virgin olive oil (Olea europaea L. cv. Cornicabra) with regard to fruit ripening and irrigation management. J Agric Food Chem 54:7130–7136CrossRefGoogle Scholar
  25. 25.
    Tena N, Lazzez A, Aparicio-Ruiz R, Garcia-Gonzalez DL (2007) Volatile compounds characterizing Tunisian Chemlali and Chétoui virgin olive oils. J Sci Food Agric 55:7852–7858CrossRefGoogle Scholar
  26. 26.
    Montedoro G, Bertuccioli M, Anichini F (1978) Aroma analysis of virgin olive oil by headspace (volatiles) and extraction (poliphenols) techniques. In: Inglett GE, Charalambous G (eds) Flavour of food and beverages: Chem tech. Academic, New York, pp 247–281CrossRefGoogle Scholar
  27. 27.
    Angerosa F, Basti C (2001) Olive oil volatile compounds from the lipoxygenase pathway in relation to fruit ripeness. Ital J Food Sci 13(4):421–428Google Scholar
  28. 28.
    Luna G, Morales MT, Aparicio R (2006) Characterisation of 39 varietal virgin olive oils by their volatile compositions. Food Chem 98:243–252CrossRefGoogle Scholar
  29. 29.
    Angerosa F, Basti C, Vito R (1999) Virgin olive oil volatile compounds from lipoxygenase pathway and characterization of some Italian cultivars. J Agric Food Chem 47:836–839CrossRefGoogle Scholar
  30. 30.
    Aparicio R, Morales MT (1998) Characterization of olive ripeness by green aroma compounds of virgin olive oil. J Agric Food Chem 46:1116–1122CrossRefGoogle Scholar
  31. 31.
    Aparicio R, Luna G (2002) Characterisation of monovarietal virgin olive oils. Eur J Lipid Sci Tech 104:614–627CrossRefGoogle Scholar
  32. 32.
    Croteau R (1975) Biosynthesis of monoterpenes and sesquiterpenes. Verlag Hans, Carl NUrnberg, pp 153–166Google Scholar
  33. 33.
    Vichi S, Lazzez A, Kamoun NG, López-Tamames E, Buxaderas S (2010) Evolution of sesquiterpene hydrocarbons in virgin olive oil during fruit ripening. J Sci Food Agric 58:6972–6976CrossRefGoogle Scholar

Copyright information

© AOCS 2016

Authors and Affiliations

  1. 1.Laboratoire de Biotechnologie de l’OlivierCentre de Biotechnologie de Borj-CedriaHammam-LifTunisia
  2. 2.Dipartimento di FarmaciaPisaItaly

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