Abbau von Linol- und Linolens urehydroperoxyden in Gegenwart von Ascorbins ure

Abstract

Hydroperoxide emulsions with 10⁻³ mol ascorbic acid were stored for 19 h at 22° C. Volatile aldehydes were formed in the presence of oxygen and traces of metals. The main compounds were identified as follows (mol-%): 2-pentenal [51] and 2-hexenal [22] from 13-hydroperoxioctadeca-9,11,15-trienoic acid; propanol [38] and 2-hexenal [25] from 9-hydroperoxioctadeca-10,12,15-trienoic acid; hexanal [82] respectively [66] from 13-hydroperoxioctadeca-9,11-respectively 9-hydroperoxioctadeca-10,12-dienoic acid. C₉ and C₁₀ aldehydes were only detected in very low concentrations as fragments of the 9-hydroperoxides.[/p] Hydroperoxyd-Emulsionen wurden 19 Std bei 22° C in Gegenwart von 10⁻³ mol Ascorbinsäure gelagert. Flüchtige Aldehyde wurden bei Anwesenheit von Sauerstoff und Metallspuren gebildet. Die Hauptverbindungen waren (mol-%): 2-Pentenal [51] und 2-Hexenal [22] aus 13-Hydroperoxioctadeca-9,11,15-triens\:aure; Propanal [38] und 2-Hexenal [25] aus 9-Hydroperoxioctadeca-10,12,15-triens\:aure; Hexanal [82] bzw. [66] aus der 13-Hydroperoxioctadeca-9,11-bzw. 9-Hydroperoxioctadeca-10,12-diens\:aure. Als Fragmente der 9-Hydroperoxyde traten C₉ und C₁₀ Aldehyde nur in sehr geringen Konzentrationen auf.[/p]