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Chemical Characterization of a High‐Oleic Soybean Oil
Author(s) -
Napolitano Guillermo E.,
Ye Yubin,
CruzHernandez Cristina
Publication year - 2018
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1002/aocs.12049
Subject(s) - oleic acid , soybean oil , chemistry , sunflower oil , linolenic acid , food science , linoleic acid , sunflower , fatty acid , chromatography , biochemistry , agronomy , biology
High‐oleic low‐linolenic acid soybean oil (HOLLSB, Plenish ® ) is an emerging new oil with projections of rapid expansion in the USA. HOLLSB has important technological advantages, which are expected to drive a gradual replacement of commodity oils used in food applications such as soybean oil. A key technological advantage of HOLLSB is its relatively high oxidation stability. This oxidation stability is the result of a favorable fatty acid composition, high (76%) oleic acid, low linoleic (6.7%), and alpha‐linolenic (1.6%) acids, and high concentration of tocopherols (936 ppm) after refining, enriched with the gamma‐homolog (586 ppm). A detailed analysis of the fatty acid composition of this HOLLSB by gas chromatography–mass spectrometry allowed the identification and structural determination of 9‐ cis ‐heptadecenoic acid (or 17:1 n ‐8). To our knowledge, this is the first time 9‐ cis ‐heptadecenoic acid has been unequivocally reported in soybean oil. This unusual fatty acid component has the potential to be used as a single authenticity marker for the quantitative assessment of soybean oil. The Rancimat induction period (IP) of Plenish ® (16.1 hours) was higher than those of other commercially available high‐oleic oils, such as canola (13.4 hours), and Vistive ® Gold (10 hours), a different variety of soybean oil. Plenish ® showed the same IP as high‐oleic sunflower oil. Plenish ® shows a modest increase in oxidation stability with the external addition or relatively high concentrations of tocopherols. The characteristic high oxidative stability of Plenish ® may be further enhanced with the use of nontocopherol antioxidants.