Characterization of sunflower oils obtained separately by pressing and subsequent solvent extraction from a new line of seeds rich in phytosterols and conventional seeds

IF 1.8 Q2 AGRONOMY

OCL-Oilseeds and Fats Crops and Lipids Pub Date : 2014-11-01 DOI:10.1051/OCL/2014033

M. Aguirre, J. Velasco, M. Ruiz-Méndez

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引用次数: 14

Abstract

In this study we evaluate the chemical composition of sunflower oils obtained separately by pressing and subsequent solvent extraction from a new seeds rich in phytosterols (IASP-18) and conventional seeds (HA-89). Results have shown that the total content of oil was much lower in the IASP-18 (18.1%) than in the conventional (37.5%) seeds. The extraction yield obtained by pressing was as low as 3% in the IASP-18 seeds and 37.5% in HA-89, while in the solvent extraction it was of the same order (~18 wt% on seeds extracted by pressing) for the two types of seeds. No significant changes in the fatty acid composition were found between the oils extracted by the two procedures, but the pressed oils presented significantly lower acidity and larger content of the unsaponifiable fraction. Expressed as free sterols, the total sterols were 37–38% more concentrated in the oils extracted with solvent, reaching amounts of 13 700 and 6500 mg/kg in the IASP-18 and HA-89 oils, respectively. No substantial differences were found in the composition of total sterols analysed as free sterols between the oils extracted with the two procedures, but the contents of free sterols and sterol glycosides were much higher in the oils extracted with solvent.

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通过压榨和随后的溶剂萃取分别从富含植物甾醇和常规种子的新系列种子中获得葵花籽油的特性

在本研究中，我们对从富含植物甾醇的新种子(IASP-18)和传统种子(HA-89)中分别压榨和随后的溶剂萃取得到的葵花籽油的化学成分进行了评价。结果表明，IASP-18种子的总油脂含量(18.1%)远低于常规种子(37.5%)。压榨法的提取率在IASP-18和HA-89中分别为3%和37.5%，而在溶剂萃取法中，两种种子的提取率在同一数量级(压榨法提取的种子约为18 wt%)。两种方法提取的油的脂肪酸组成没有明显变化，但压榨后的油酸度明显降低，不皂化部分含量较高。以游离甾醇表示的总甾醇在溶剂提取的油脂中含量高出37-38%，在IASP-18和HA-89油脂中含量分别达到13 700和6500 mg/kg。两种方法提取的总甾醇作为游离甾醇的组成没有明显差异，但溶剂提取的游离甾醇和甾醇苷的含量要高得多。

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来源期刊

OCL-Oilseeds and Fats Crops and Lipids AGRONOMY-

CiteScore

4.70

自引率

14.30%

发文量

审稿时长

10 weeks

期刊介绍： OCL-Oilseeds and fats, Crops and Lipids is a peer-reviewed full Open-Access scientific journal devoted to fats, lipids and oil- and protein-crops. OCL covers the entire sector. The research papers and reviews published address a range of topical matters in agronomy, plant biology, biochemistry, analytical chemistry, lipid chemistry, as well as transversal research themes such as nutrition, the health-quality-food safety nexus, innovation and industrial processes, the environment and sustainable development, economics and social development. A particular feature of OCL is the inclusion of special thematic sections focusing on a topical subject among the Journal''s core domains. Invited contributors to these thematic sections are chosen with care in order to ensure the expression of a genuine cross-section of interests and expertise.