Tocopherol composition of deodorization distillates and their antioxidative activity

Autor(en)

Malgorzata Nogala-Kalucka, Jozef Korczak, Karl Heinz Wagner, Ibrahim Elmadfa

Abstrakt

During the last stage of plant oil refining, deodorization distillates containing very important biological substances such as tocopherols, sterols, terpenoids or hydrocarbons are formed as a by-products. This study aimed at evaluating the content and antioxidant capacity of tocopherol concentrates from deodorization distillates obtained after the refining of rapeseed, soybean and sunflower oil. The majority of the matrix substances were eliminated from deodorization distillates by freezing with an acetone solution at -70°C. The tocopherol concentrates obtained in this way contained approximately fivefold more tocopherols than the quantity in condensates after deodorization. Antioxidant activity was investigated by observing the peroxide value at 25°C and using the Oxidograph test. The test medium was lard enriched with the tocopherol concentrates of the three plant oils versus single, synthetic α-, γ- and δ-tocopherols (-T), which served for comparison. In these model systems, all investigated tocopherol concentrates exhibited antioxidant capacity. Their antioxidant effect was significantly lower than that of single δ-T and γ-T, but significantly higher than α-T. The results prove that natural tocopherol concentrates obtained from plant oils are valuable food antioxidants and they also increase the biological and nutritional value of food especially when administered to animal fats or food of animal origin. Tocopherol concentrates can fully replace synthetic antioxidants that have been used thus far.

Organisation(en)

Department für Ernährungswissenschaften

Externe Organisation(en)

Poznań University of Life Sciences

Journal

Nahrung = Food : structure, function, interaction

Band

48

Seiten

34-37

Anzahl der Seiten

4

ISSN

0027-769X

DOI

https://doi.org/10.1002/food.200300335

Publikationsdatum

02-2004

Peer-reviewed

Ja

ÖFOS 2012

303009 Ernährungswissenschaften

Schlagwörter

ASJC Scopus Sachgebiete

Food Science

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/tocopherol-composition-of-deodorization-distillates-and-their-antioxidative-activity(509058ea-0023-4001-a41b-183b7124da2d).html