Changes of Sunflower Oil Polyenoic Fatty Acids under High Temperatures

K. Cihelková, M. Zárubová, I. Hrádková, V. Filip and J. Šmidrkal
Additional contact information
M. Zárubová: Department of Dairy and Fat Technology, Institute of Chemical Technology in Prague, 66 28 Prague, Czech Republic
I. Hrádková: Department of Dairy and Fat Technology, Institute of Chemical Technology in Prague, 66 28 Prague, Czech Republic
V. Filip: Department of Dairy and Fat Technology, Institute of Chemical Technology in Prague, 66 28 Prague, Czech Republic
J. Šmidrkal: Department of Dairy and Fat Technology, Institute of Chemical Technology in Prague, 66 28 Prague, Czech Republic

Czech Journal of Food Sciences, 2009, vol. 27, issue SpecialIssue1, S13-S16

Abstract: Heat induced cis-trans isomerisation of sunflower oils depending on temperature, reaction time and original content of linoleic acid was investigated. The content of isomeric fatty acids was determined by gas chromatography and the content of polymers by gel permeation high-performance liquid chromatography. The content of trans fatty acids increased with time and with temperature and a rate of cis-trans isomerisation and polymerisation depends on the temperature according to Arrhenius equation. The content of polymers was significantly lower in sunflower oil with high content of oleic acid because of the low concentration of linoleic acid in oil. In both oils the content of conjugated linoleic acid initially increased depending on time and temperature, however after certain time the stationary state occurred. Polymerisation of polyenoic fatty acids takes place directly with heat induced cis-trans isomerisation.

Keywords: cis-trans isomerisation; polymerisation; trans fatty acid; conjugated linoleic acid (search for similar items in EconPapers)
Date: 2009
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://cjfs.agriculturejournals.cz/doi/10.17221/918-CJFS.html (text/html)
http://cjfs.agriculturejournals.cz/doi/10.17221/918-CJFS.pdf (application/pdf)
free of charge

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:27:y:2009:i:specialissue1:id:918-cjfs

DOI: 10.17221/918-CJFS

Access Statistics for this article

Czech Journal of Food Sciences is currently edited by Ing. Zdeňka Náglová, Ph.D.

More articles in Czech Journal of Food Sciences from Czech Academy of Agricultural Sciences
Bibliographic data for series maintained by Ivo Andrle ().