Food Chemistry 2015-12-01

Subcritical extraction of flaxseed oil with n-propane: Composition and purity.

Ana Beatriz Zanqui, Damila Rodrigues de Morais, Claudia Marques da Silva, Jandyson Machado Santos, Sandra Terezinha Marques Gomes, Jesuí Vergílio Visentainer, Marcos Nogueira Eberlin, Lúcio Cardozo-Filho, Makoto Matsushita

Index: Food Chem. 188 , 452-8, (2015)

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Abstract

Flaxseed (Linum usitatissimum L.) oil was obtained via subcritical n-propane fluid extraction (SubFE) under different temperatures and pressures with an average yield of 28% and its composition, purity and oxidative stability were compared to oils obtained via conventional solvent extraction methods (SEMs). When the oxidative stability was measured by differential scanning calorimetry, the oil was found to be up to 5 times more resistant to lipid oxidation as compared to the SEM oils. Direct infusion electrospray ionization mass spectrometry (ESI-MS) analysis showed characteristic and similar TAG profiles for SubFE and SEMs oils but higher purity for the SubFE oil. The flaxseed oil content of β-tocopherol, campesterol, stigmasterol and sitosterol were quantified via GC-MS. SubFE showed to be a promising alternative to conventional SEM since SubFE provides an oil with higher purity and higher oxidation stability and with comparable levels of biologically active components. Copyright © 2015 Elsevier Ltd. All rights reserved.