A gas chromatographic method for testing antioxidants

Rogstad, Astri; Reinton, Ragnhild

doi:10.1007/bf02671096

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Cited by 7 publications

(1 citation statement)

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“…11.12, 52,000 unit/mg) in 0.17 M boric acid buffer at a weight ratio of 1:30 to linoleic acid. Linoleic acid was dissolved in ethanol at ratio of 1.7 mL to 1 mL (21,22).…”

Section: Methodsmentioning

confidence: 99%

Antioxidant Characteristics of Melanin-Related Products from Enzymatic Browning Reaction of Catechin in a Model System

Cheigh

Lee

1995

ACS Symposium Series

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“…11.12, 52,000 unit/mg) in 0.17 M boric acid buffer at a weight ratio of 1:30 to linoleic acid. Linoleic acid was dissolved in ethanol at ratio of 1.7 mL to 1 mL (21,22).…”

Section: Methodsmentioning

confidence: 99%

Antioxidant Characteristics of Melanin-Related Products from Enzymatic Browning Reaction of Catechin in a Model System

Cheigh

Lee

1995

ACS Symposium Series

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α‐Tocopherol prooxidant effect in aqueous media: Increased autoxidation rate of linoleic acid

Cillard¹,

Cillard²,

Cormier³

et al. 1980

J Americ Oil Chem Soc

107

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The prooxidant effect of ~-tocopherol was investigated during linoleic acid autoxidation in an aqueous media, at pH 6.9. oeTocopherol (1.25 x 10 -4 M) was added to linoleic acid (2.5 x 10 -3 M) and the linoleic acid autoxidation rate was evaluated using 2 methods: spectrophotometric measurement at 234 nm exhibited an important increase of conjugated dienes after ~-tocopherol addition, especially during the first 4 days, and gas chromatographic measurement of unoxidized linoleic acid showed an important degradation of linoleic acid in the presence of a-tocopherol. During the prooxidant reaction, a-tocopherol was rapidly oxidized; it was detected as traces by thin layer chromatography after 4 days of experimentation. Two oxidation products of a-tocopherol have been identified: a-tocopherylquinone and a dimer of c~-tocophero[.

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Effect of experimental factors on the prooxidant behavior of α‐tocopherol

Cillard¹,

Cillard²,

Cormier³

1980

J Americ Oil Chem Soc

102

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We have investigated the effect of experimental factors on the prooxidant effect of α‐tocopherol during the autoxidation of linoleic acid. The prooxidant effect depended on two factors: the concentration of α‐tocopherol (≥ 5 x 10−3 mol α‐tocopherol/1 mol linoleic acid) and the solvent, an aqueous system in which the prooxidant effect occurred more easily. On the other hand, the prooxidant behavior of α‐tocopherol was unaffected by the type of surfactant used in water as well as by the presence of different salts. The initial content of hydroperoxides affected the intensity of the prooxidant effect which varied in an inverse ratio to the initial hydroperoxide level.

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A gas chromatographic method for testing antioxidants

Cited by 7 publications

References 19 publications

Antioxidant Characteristics of Melanin-Related Products from Enzymatic Browning Reaction of Catechin in a Model System

Antioxidant Characteristics of Melanin-Related Products from Enzymatic Browning Reaction of Catechin in a Model System

α‐Tocopherol prooxidant effect in aqueous media: Increased autoxidation rate of linoleic acid

Effect of experimental factors on the prooxidant behavior of α‐tocopherol

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