The effects of processing aids and techniques on olive oil extractability and oil quality índices




Oil yield, Olive oil, Processing aids, Profile fatty acids, Qualitative characteristics


This study was conducted to investigate the effects of processing aids and techniques such as talcum powder (2% w/w), calcium carbonate (2% w/w), warm water dipping (45 °C), combined treatment (warm water dipping+2% calcium carbonate) and control (without adding processing aid) on extractability and quality of ‘Tarom 7’ olive oil as randomized complete block design with three replicates. The results showed that there were no significant differences in the carotenoid content, K232, fatty acid profile or the Cox’s value in the oil obtained from untreated and treated fruits with processing aids. The highest chlorophyll content (0.84 mg/kg), total phenolic content (236.94 mg/kg), paste extractability (8.5%) and the lowest peroxide values (0.32 meqO2/kg), K270 (0.38) were obtained from the oil extracted with 2% talc powder. According to the results, it can be suggested that the 2% talc powder treatment could have a positive effect on olive oil quality and paste extractability.


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Aguilera MP, Beltran G, Sanchez-Villasclaras S, Uceda M, Jimenez A. 2010. Kneading olive paste from unripe 'Picual'fruits: I. Effect on oil process yield. J. Food Eng. 97, 533-538.

Al-Okaby MF, Rasmy Nagwa M, El-Kalyoubi MH, Girgis AY. 2015. Improving the Extraction Efficiency and Quality of Virgin Olive Oil Using Citric Acid. Middle East J. Appl. Sci. 5, 148-156.

Al-Rousan WM. 2017. Optimization Olive Oil Extraction by Pre-heat Treatment Olive Fruits. Adv. J. Food Sci. Technol. 13, 33-39.

Altieri G, Genovese F, Tauriello A, Di Renzo GC. 2015. Innovative plant for the separation of high quality virgin olive oil (VOO) at industrial scale. J. Food Eng. 166, 325-334.

AOCS. 1998. American Oil Chemists' Society Official method Cd 8-53. Peroxide Value. In Firestone, D., Ed., Official Methods and Recommended Practices of the American Oil Chemists' Society, 5th Edition, AOCS, Champaign, III.

Ben Brahim S, Marrakchi F, Gargouri B, Bouaziz M. 2015. Optimization of malaxing conditions using CaCo3 as a coadjuvant: a method to increase yield and quality virgin olive cv Chemlali. LWT-Food Sci Technol. 63, 243-252.

Ben-David E, Kerem Z, Zipori I, Weissbein S, Basheer L, Bustan A, Dag A. 2010. Optimization of the Abencor system to extract olive oil from irrigated orchards. Eur. J. Lipid Sci. Technol. 112, 1158-1165.

Canamasas P, Ravetti L. 2011. Evaluation of processing aids for olive oil extraction and quality improvement. Rural Industries Research and Development Corporation Publication No. 11/091.

Canamasas P, Ravetti LM. 2014. Evaluation of traditional and new processing aids for olive oil extraction. Acta Hortic. 1057, 677-684.

Caponio F, Squeo G, Monteleone JI, Paradiso VM, Pasqualone A, Summo C. 2016. First and second centrifugation of olive paste: Influence of talc addition on yield, chemical composition and volatile compounds of the oils. LWT-Food Sci. Technol. 64, 439-445.

Caponio F, Monteleone JI, Martellini G, Summo C, Paradiso VM, Gomes T. 2014. Effect of talc addition on the extraction yield and quality of extra virgin olive oils from Coratina cultivar after production and during storage. J. Oleo Sci. 63, 1125. PMid:25296576

Carrapiso AI, García A, Petrón MJ, Martín L. 2013. Effect of talc and water addition on olive oil quality and antioxidants. Eur. J. Lipid Sci. Technol. 115, 583-538.

Criado MN, Romero MP, Motilva MJ. 2007. Effect of the technological and agronomical factors on pigment transfer during olive oil extraction. J. Agric. Food. Chem. 55, 5681-5688. PMid:17579426

Cruz S, Yousfi K, Pérez AG, Mariscal C, García JM. 2007. Salt improves physical extraction of olive oil. Eur. Food Res. Technol. 225, 359-365.

Espínola F, Moya M, de Torres A, Castro E. 2015. Comparative study of coadjuvants for extraction of olive oil. Eur. Food Res. Technol. 241, 759-768.

Espínola F, Moya M, Fernández DG, Castro E. 2009. Improved extraction of virgin olive oil using calcium carbonate as coadjuvant extractant. J. Food Eng. 92, 112-118.

EEC. 1991. European Commission Regulation 2568/91 of 11 July 1991 on the characteristics of olive oil and olive-residue oil and on the relevant methods of analysis. Official Journal of the European Community, August 5, 1991

Farag RS, El-Baroty G, Abd-El-Aziz N, Basuny, AM. 1997. Stabilization of olive oil by microwave heating. Int. J. Food Sci. Nutr. 48, 365-371.

Fatemi SH, Hammond EG. 1980. Analysis of oleate, linoleate and linolenate hydroperoxides in oxidized ester mixtures. Lipids 15, 379-385.

Fernández-Valdivia DG, Espínola F, Moya M. 2008. The influence of different technological coadjuvants on the quality and yield of virgin olive oil using response surfaces methodology. Grasas Aceites 59, 39-44.

García JM, Yousfi K, Oliva J, García-Diaz MT, Pérez-Camino MC. 2005. Hot water dipping of olives (Olea europeae) for virgin oil debittering. J. Agric. Food Chem. 53, 8248-8252. PMid:16218671

Khaleghi E, Arzani K, Moallemi N, Mohsen Barzegar M. 2015. The efficacy of kaolin particle film on oil quality indices of olive trees (Olea europaea L.) cv 'Zard' grown under warm and semi-arid region of Iran. Food Chem. 166, 35-41. PMid:25053025

Koprivnjak O, Bubola KB, Kosić U. 2016. Sodium chloride compared to talc as processing aid has similar impact on volatile compounds but more favourable on ortho-diphenols in virgin olive oil. Eur. J. Lipid Sci. Technol. 118, 318-324.

Mínguez-Mosquera MI, Rejano L, Gandul B, Sanchez AH, Garrido J. 1991. Color-pigment correlation in virgin olive oil. J. Am. Chem. Soc. 68, 332-336.

Montedoro G, Servili M, Baldioli M, Miniati E. 1992. Simple and hydrolyzable phenolic compounds in virgin olive oil. 1. Their extraction, separation, and quantitative and semiquantitative evaluation by HPLC. J. Agric. Food Chem. 40, 1571-1576.

Moya M, Espínola F, Fernández DG, de Torres A, Marcos J, Josue J, Sánchez T, Castro E. 2010. Industrial trials on coadjuvants for olive oil extraction. J. Food Eng. 97, 57-63.

Najafian L, Ghodsvali A, Haddad Khodaparast MH, Diosady LL. 2009. Aqueous extraction of virgin olive oil using industrial enzymes. Food Res. Int. 42, 171-175.

Peres F, Martins LL, Ferreira-Dias S. 2014. Laboratory-scale optimization of olive oil extraction: simultaneous addition of enzymes and microtalc improves the yield. Eur. J. Lipid Sci. Technol. 116, 1054-1062.

Sadkaoui A, Jiménez A, Pacheco R, Beltrán G. 2016. Micronized natural talc with a low particle size and a high carbonate rate is more effective at breaking down oil-in-water emulsion. Eur. J. Lipid Sci. Technol. 118, 545-552.

Servili M, Selvaggini R, Taticchi A, Esposto S, Montedoro GF. 2003. Volatile compounds and phenolic composition of virgin olive oil: optimization of temperature and time of exposure of olive paste to air contact during the mechanical extraction. J. Agric. Food. Chem. 51 , 7980-7988. PMid:14690383

Sharma R, Sharma PC. 2007. Optimization of enzymatic pretreatments for maximizing olive oil recovery. J. Sci. Ind. Res. 66, 52-55.

Vidal AM, Alcalá S, de Torres A, Moya M, Espínola F. 2018. Use of talc in oil mills: Influence on the quality and content of minor compounds in olive oils. LWT-Food Sci. Technol. 98, 31-38.



How to Cite

Khaleghi E, Norozi Moghadam H, Mortazavi S. The effects of processing aids and techniques on olive oil extractability and oil quality índices. grasasaceites [Internet]. 2023Mar.16 [cited 2023Dec.2];74(1):e494. Available from: