Avocado pulp is widely regarded as a great source of edible oil containing fat-soluble vitamins and omega-3 fatty acids (FA). However, avocado peel and seeds are also good sources of edible oil and are less explored byproducts. This paper aimed at determining the proximal composition, FA and tocopherol contents of the pulp, peel, and seeds of Quintal, Fortuna, Margarida, and Hass avocado cultivars. The pulps presented high concentrations of oleic acid. In addition, peel and seeds presented lower omega-6/omega-3 ratios than the pulp. There was also a considerable amount of tocopherol in the peel and seeds, especially in Hass peel (230.7 mg/100 g). According to the results, the peel and seeds of avocado that are considered byproducts, can be utilized in food industry.
Aguiar, A.C., Cottica, S.M., Boroski, M., Oliveira, C.C., Bonafe, E.G., Franca, P.B., Souza, N.E. & Visentainer, J.V. (2011): Quantification of essential fatty acids in the heads of Nile tilapia (Oreochromis niloticus) fed with linseed oil. J. Brazil. Chem. Soc., 22, 643–647.
AOAC (1998): Official methods of analysis of AOAC International, Association of Official Analytical Chemists (16th ed), Moisture in malt (935.29), Ash (900.02), Total Kjeldahl nitrogen (920.152).
Bligh, E.G. & Dyer, W.J. (1959): A rapid method of total lipid extraction and purification. Can. J. Biochem. Phys., 37, 911-917.
Codex Alimentarius Commission (2009): Codex-Stan 210: Codex standard for named vegetable oils. Rome.
Department Of Health (UK) (1994): Nutritional aspects of cardiovascular disease: Report on health and social subjects. No.46, H.M.S.O., London. 186 pages.
Donetti, M. & Terry, L.A. (2014): Biochemical markers defining growing area and ripening stage of imported avocado fruit cv. Hass. J. Food Compos. Anal., 34, 90–98.
Duarte, P.F., Chaves, M.A., Borges, C.D., Mendonça, C.R.B. (2016): Avocado: characteristics, health benefits and uses. Cienc. Rural, 46, 747–754.
Freitas, L.S., Jacques, R.A., Richter, M.F., Silva, A.L. & Caramão, E.B. (2008): Pressurized liquid extraction of vitamin E from Brazilian grape seed oil. J. Chromatogr. A., 1200, 80–83.
Gómez-López, V.M. (1998): Characterization of avocado (Persea americana Mill.) varieties of very low oil content. J. Agr. Food Chem., 46, 3643–3647.
Gómez-López, V.M. (2002): Fruit characterization of high oil content avocado varieties. Sci. Agr., 59, 403–406.
Hartman, L. & Lago, R.C.A. (1973): Rapid preparation of fatty acid methyl esters from lipids. Lab. Pract., 22, 474–476.
Honarbakhsh, S. & Schachter, M.W. (2009): Vitamins and cardiovascular disease. Brit. J. Nutr., 101, 1113–1131.
Meyer, M.D. & Terry, L.A. (2008): Development of a rapid method for the sequential extraction and subsequent quantification of fatty acids and sugars from avocado mesocarp tissue. J. Agr. Food Chem., 56, 7439–7445.
Ozdemir, F. & Topuz, A. (2004): Changes in dry matter, oil content and fatty acids composition of avocado during harvesting time and post-harvesting ripening period. Food Chem., 86, 79–83.
R Core Team (2016): R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. https://www.R-project.org/
Tango, J.S., Carvalho, C.R.L. & Soares, N.B. (2004): Caracterização física e química de frutos de abacate visando a seu potencial para extração de óleo (Physical and chemical characterization of avocado fruit aiming at their potential for oil extraction). Rev. Bras. Frutic., 26, 17–23.
Vekiari, S.A., Papadopoulou, P.P., Lionakis, S. & Krystallis, A. (2004): Variation in the composition of Cretan avocado cultivars during ripening. J. Sci. Food Agr., 84, 485–492.
Villa-Rodríguez, J.A., Molina-Corral, F.J., Ayala-Zavala, J.F., Olivas, G.I. & González-Aguilar, G.A. (2011): Effect of maturity stage on the content of fatty acids and antioxidant activity of ‘Hass’ avocado. Food Res. Int., 44, 1231–1237.
Vinha, A.F., Moreira, J. & Barreira, S.V.P. (2013): Physicochemical parameters, phytochemical composition and antioxidant activity of the algarvian avocado (Persea americana Mill.). J. Agr. Sci., 5(12), 100–109.
Visentainer, J.V. (2012): Aspectos analíticos da resposta do detector de ionização em chama para ésteres de ácidos graxos em biodiesel e alimentos (Analytical aspects of the flame ionization detector response of fatty acid esters in biodiesels and foods). Quim. Nova, 35, 274–279.
WHO (1995): World Health Organization Joint consultation: Fats and oils in human nutrition. Nutr. Rev., 53, 202–205.