College of Enology, Northwest A&F University, Yangling 712100, Shaanxi, China.
Molecules. 2012 Jul 25;17(8):8804-21. doi: 10.3390/molecules17088804.
The antioxidant activities in the Cabernet Sauvignon and Merlot wines from four wine grape-growing regions in China were measured by different analytical assays: 2,2-diphenyl-1-picrylhydrazyl (DPPH·), cupric reducing antioxidant capacity (CUPRAC), superoxide radical-scavenging activity (SRSA) and the contents of total phenols, total flavonoids, total flavanols and total anthocyanins were determined. The results showed that the contents of phenolic compounds and the levels of antioxidant activity in the wine samples greatly varied with cultivar and environmental factors of vine growth. The contents of phenolic compounds and antioxidant activities in Cabernet Sauvignon and Merlot wines from the Yuquanying region of Ningxia were significantly higher than other three regions, followed by the wines from Shacheng region of Hebei, and these parameters were the lowest in Cabernet Sauvignon and Merlot wines from the Changli regions of Hebei and Xiangning region of Shanxi. Taken together, a close relationship between phenolic subclasses and antioxidant activity was observed for the wine samples. Moreover, there were significant discrepancies in the individual phenolic composition and content of four regional Cabernet Sauvignon and Merlot wines, among which the individual phenolic compounds (catechin, epicatechin, cinnamic acid, quercetin-3-O-glucuronide, quercetin-3-O-glucoside, laricitrin-3-O-glucoside and isorhamnetin-3-O-glucoside) revealed a significant correlation (p < 0.05) with the antioxidant capacity in present study, especially for catechin and epicatechin.
2,2-二苯基-1-苦基肼基（DPPH·）、铜还原抗氧化能力（CUPRAC）、超氧自由基清除活性（SRSA）以及总酚、总黄酮、总黄烷醇和总花色苷的含量。结果表明，葡萄酒样品中酚类化合物的含量和抗氧化活性水平随品种和葡萄生长的环境因素而有很大差异。宁夏玉泉营地区赤霞珠和梅洛葡萄酒中的酚类化合物含量和抗氧化活性明显高于其他三个地区，其次是河北沙城地区，而河北昌黎和山西襄宁地区的赤霞珠和梅洛葡萄酒中的这些参数最低。综上所述，观察到葡萄酒样品中酚类亚类与抗氧化活性之间存在密切关系。此外，四个地区赤霞珠和梅洛葡萄酒的个体酚类组成和含量存在显著差异，其中单体酚类化合物（儿茶素、表儿茶素、肉桂酸、槲皮素-3-O-葡萄糖醛酸、槲皮素-3-O-葡萄糖苷、柳皮苷-3-O-葡萄糖苷和异鼠李素-3-O-葡萄糖苷）与抗氧化能力呈显著相关（p < 0.05），尤其是儿茶素和表儿茶素。
