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Measuring antioxidant efficiency of wort, malt, and hops against the 2,2'-azobis(2-amidinopropane) dihydrochloride-induced oxidation of an aqueous dispersion of linoleic acid.

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Authors :
Document type : Article de périodique (Journal article) – Journal Article, Research Support, Non-U.S. Gov't
Abstract :

This paper presents a simple, convenient method for determining the efficiency of antioxidants in aqueous systems. Production of conjugated diene hydroperoxide by oxidation of linoleic acid in an aqueous dispersion is monitored at 234 nm. 2, 2'-Azobis(2-amidinopropane) dihydrochloride is used as a free radical initiator. Among 12 antioxidants tested, phenolic compounds proved to be the most efficient, both kinetically and in terms of the inhibition time (T(inh)). Applied to wort, malt, and hops, the method confirmed a significant antioxidant activity in such products, especially hops. This assay can be used to follow oxidative changes throughout the brewing process and to understand the contribution of each raw material.
Access type : Accès restreint
Publication date : 2000
Journal information : "Journal of agricultural and food chemistry" - Vol. 48, no. 4, p. 1129-34 (2000)
Peer reviewed : yes
issn : 0021-8561
Publication status : Publié
Affiliation : UCL - AGRO/CABI - Département de chimie appliquée et des bio-industries
MESH Subject : Amidines - chemistry ; Antioxidants - chemistry - isolation & purification ; Beer ; Cereals ; Linoleic Acid - chemistry ; Oxidants - chemistry ; Oxidation-Reduction ; Water
Links :
Bibliographic reference Liégeois, C ; Lermusieau, G ; Collin, Sonia. Measuring antioxidant efficiency of wort, malt, and hops against the 2,2'-azobis(2-amidinopropane) dihydrochloride-induced oxidation of an aqueous dispersion of linoleic acid.. In: Journal of agricultural and food chemistry, Vol. 48, no. 4, p. 1129-34 (2000)
Permanent URL http://hdl.handle.net/2078.1/8504