以西北部产区(焉耆盆地、吐哈盆地、天山北麓、伊犁河谷)及中部产区(河北产区)葡萄酒为样本,测定其多酚组成及抗氧化能力,分析样品间差异性及相关性,探究影响抗氧化功效的单体酚物质。通过对酚类物质含量、DPPH、ABTS+、羟自由基清除率的测定,结果显示,西北部产区样品酚类物质含量高,且种类丰度较高;焉耆与伊犁产区葡萄酒抗氧化能力较高。相关性分析表明,DPPH、ABTS+、羟自由基的清除率分析结果具有极显著正相关性;对抗氧化能力贡献较大的多酚类别依次为对羟基肉桂酸、芪类、对羟基苯甲酸、黄烷-3-醇、黄酮醇,对抗氧化能力贡献较大的单体酚依次为芥子酸、水杨酸、杨梅素、儿茶素、表儿茶素。
The composition and antioxidant capacity of polyphenols in wines from northwestern China (Yanqi Basin, Tuha Basin, the northern foothill of Tianshan Mountain and Yili River Valley) and central China (Hebei province) were measured, the differences and correlations among samples were analyzed, and the monomer phenolic substances affecting the antioxidant effect were explored. The determination of phenolic substance content, DPPH, ABTS+ and hydroxyl radical scavenging rate showed that the content of phenolic substance and the species abundance were high in wines from northwestern China. The antioxidant capacity of wine from Yanqi and Yili was higher. The correlation analysis showed that DPPH, ABTS+ and hydroxyl radical had significant positive correlation. Polyphenols that contributed more to the oxidation resistance were p-hydroxycinnamic acid, astragalus, p-hydroxybenzoic acid, flavan-3-alcohol and flavonol in order, while monomer phenols that contributed more to the oxidation resistance were erucic acid, salicylic acid, myricetin, catechin and epicatechin in order.
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