| http://www.w3.org/ns/prov#value | - Preferable oxygen scavengers are those containing hydrosulfite as the principal component, those containing organic material such as L-ascorbic acid as the principal component, those containing iron powder as the principal component, mixture compositions of iron and at least one material selected from the group consisting of ferrous silicate sulfate.7 hydrate, sodium alum, disodium hydrogen phosph
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