title: Influence of demetallization of hydrogenated sunflower oil on changes in the forms of heavy metals and their pro-oxidative effects.
abstract: The effect of removing heavy metals from hydrogenated sunflower oil using a method based on changes in the contents of the various forms of the heavy metals copper, iron, zinc and nickel and their respective pro-oxidative effects was studied. A high degree of removal of dissociated and bounded ions was observed for hydrogenated oil, while there was no change in the contents of the co-ordination form. The pro-oxidative effect of the dissociated ions and of the bound metal ions in hydrogenated oil decreased nine-fold and seven-fold, respectively, compared with that of the non-hydrogenated oil, as a result of which the oxidation stability of hydrogenated oil increased two-fold. Comparative studies confirmed as appropriate the use of wash waters and auxiliary solutions that do not contain heavy metals for the processing of the hydrogenate after the classical technology.
authors.affiliation: Higher Institute of Food and Flavour Industries, Plovdiv, Bulgaria.
authors.forename: K
authors.initials: K
authors.lastname: Ianov
authors.forename: D
authors.initials: D
authors.lastname: Maneva
authors.forename: S
authors.initials: S
authors.lastname: Ivanov
mesh_terms: D003300:Copper / Q000302:isolation & purification; D004042:Dietary Fats, Unsaturated / Q000378:metabolism*; D005506:Food Contamination; D006368:Helianthus; D006865:Hydrogenation; D007501:Iron / Q000302:isolation & purification; D008670:Metals / Q000737:chemistry* / Q000302:isolation & purification* / Q000378:metabolism; D009532:Nickel / Q000302:isolation & purification; D010084:Oxidation-Reduction; D010938:Plant Oils / Q000737:chemistry* / Q000378:metabolism; D000074242:Sunflower Oil; D015032:Zinc / Q000302:isolation & purification
chemical_list: D004042:Dietary Fats, Unsaturated; D008670:Metals; D010938:Plant Oils; D000074242:Sunflower Oil; D003300:Copper; D009532:Nickel; D007501:Iron; D015032:Zinc