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Food Chem. 2015 May 15;175:593-600. doi: 10.1016/j.foodchem.2014.12.010. Epub 2014 Dec 11.

Antioxidant activities of tocopherols/tocotrienols and lipophilic antioxidant capacity of wheat, vegetable oils, milk and milk cream by using photochemiluminescence.

Author information

1
Institute of Nutrition, Friedrich Schiller University Jena, Dornburger Straße 25-29, D-07743 Jena, Germany.
2
Analytik Jena AG, Jena, Germany.
3
Institute of Nutrition, Friedrich Schiller University Jena, Dornburger Straße 25-29, D-07743 Jena, Germany. Electronic address: volker.boehm@uni-jena.de.

Abstract

The purpose of this study was to measure the antioxidant activity (AOA) of tocopherols and tocotrienols by using photochemiluminescence (PCL). This method enables to detect total lipophilic antioxidants. The AOA of all vitamin E isomers depended on number and position of methyl groups in the chroman ring. Correlation between the AOA and the redox potential and the biological activity of the tocochromanols was observed. The second aim was to analyse different kinds of wheat, vegetable oils, milk and milk cream on their antioxidant capacity (AOC) by using PCL and α-TEAC. The contents of vitamin E and carotenoids were analysed by HPLC. Correlations between the sum of carotenoids and vitamin E and the AOC were detected. Based on high vitamin E contents, the oils had the highest and in contrast, the product macaroni showed the lowest AOC. A concentration-dependent effect was observed in both assays, PCL and α-TEAC.

KEYWORDS:

Carotenoids; Lipophilic antioxidants; Redox potential; Singlet oxygen; α-Tocopherol (PubChem CID: 14985); α-Tocotrienol (PubChem CID: 5282347); β-Tocopherol (PubChem CID: 6857447); β-Tocotrienol (PubChem CID: 5282348); γ-Tocopherol (PubChem CID: 92729); γ-Tocotrienol (PubChem CID: 5282349); δ-Tocopherol (PubChem CID: 92094); δ-Tocotrienol (PubChem CID: 5282350)

PMID:
25577124
DOI:
10.1016/j.foodchem.2014.12.010
[Indexed for MEDLINE]

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