Determinação da composição proximal e de ácidos graxos nas sementes de butia catarinesis Noblick & Lorenzi

Abstract

The Butia catarinensis Noblick & Lorenzi, that occurrs in south Brazil, it is a fleshy and fibrous fruit. The seed is source of oil that has been few studied. The aim of this study was determine the proximate composition of the seed and fatty acid composition of the oil extracted. The proximate composition (moisture, ash, protein, carbohydrates and lipids) was determined by analytical methods, and the oil was extracted with cold solvent. Two methods of esterification were used: acid catalysis and basic catalysis. The quantification of fatty acids was done by gas chromatography using internal standardization. The seed presented 16,55% in moisture, 1,60% in ash, 9,86% in protein, 32,12 % in carbohydrates and 39,87% in lipids. The oil extracted from the seed present high content of saturated fatty acids, with a greater amount of lauric acid (12:0), those content was 43,23 g 100 g-1. In relation to the unsaturated fatty acids, oleic acid (18:1n-9) was found in higher proportion with the concentration of 20,01 g 100 g-1 of oil. The acid catalysis method was more efficient in determination of the total concentration of fatty acids.