Scientific journal

57 2018

Journal of Food and Nutrition Research
Summary No. 1 / 2018

Alzate Arbeláez, A. F. – Cogollo Pacheco, Á. – Rojano, B.
Composition, antioxidant activity, thermal and oxidative stability of Lecythis tuyrana oil
Journal of Food and Nutrition Research, 57, 2018, No. 1, s. 87-97

Benjamín Rojano, Food Science Laboratory, School of Chemistry, Faculty of Science, National University of Colombia, Street 59A # 63-20, 050034 Medellín, Colombia. E-mail: brojano@unal.edu.co

Received 9 October 2017; 1st revised 1 December 2017; accepted 10 January 2018; published online 14 March 2018

Summary: Oil from Lecythis tuyrana oilseeds is extracted for its potential use in food industry. The aim of this study was to gain knowledge on composition, antioxidant activity and thermal oxidative stability of this type of oil. Compositional parameters were evaluated. Antioxidant activity was evaluated by oxygen radical absorbance capacity and 2,2-diphenyl-1-picrylhydrazyl radical. Oxidative stability was evaluated by peroxide value, thiobarbituric acid reactive substances values and oxidative stability index (OSI). Thermal stability was determined by thermogravimetric assay and differential scanning calorimetry. Almonds were found to have a high oil content of 732 g·kg-1. Total carotenoids, tocopherols and phenols were also quantified. OSI showed an induction time of 3.47 h and it was thermostable up to 200 °C. It was possible to improve the stability of oil by 27.5 % under accelerated conditions, using butylated hydroxytoluene as an antioxidant. L. tuyrana is a good source of unsaturated fatty acids (oleic acid 369.0 g·kg-1, linoleic acid 272.0 g·kg-1, palmitic acid 171.0 g·kg-1, stearic acid 149.0 g·kg-1, arachidonic acid 10.0 g·kg-1, palmitoleic acid 7.0 g·kg-1), which are oxidatively stabilized by the presence of carotenoids, phenols and tocopherols. In this way, the new oil with interesting nutraceutical properties is proposed to be used in the food, cosmetic and pharmaceutical industry.

Keywords: edible oil; Lecythis tuyrana; oxidative stability; thermal stability; oilseeds

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