Abstract Tannat red wine residues present a unique polyphenolic composition. Revalorization of this residue depends on adequate extraction technologies to assure process sustainability. Influence of temperature (15−60 °C), ultrasound (US) power (0−100 W) and US application time (5−50 min) on Ultrasound Assisted Extraction (UAE) of fresh and freeze-dried Tannat grape pomace was evaluated. UAE was performed in a US bath, following extraction kinetics throughout 50 min by assessing: total polyphenol content (TPC), total monomeric anthocyanins (TMAC) and total antioxidant capacity (AOC). Additionally, HPLC analysis was performed to determine extracted compounds’ profile. Results showed UAE enhanced extraction in both fresh and freeze-dried pomace. In fresh pomace, UAE yielded extracts 50% richer in TPC and TMAC on average when compared to conventional extractions, while in freeze-dried pomace 180% increase in extraction was achieved. In fresh and freeze-dried pomace, US application allowed extraction of different compounds with respect to conventional extraction. This work shows that UAE has potential for Tannat grape pomace valorization, yet UAE conditions should be carefully selected to favour desired extract composition.

中文翻译：

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超声辅助提取新鲜和冻干葡萄品种 Tannat 葡萄渣中的生物活性化合物

摘要 丹拿红葡萄酒残留物具有独特的多酚成分。这种残留物的再利用取决于适当的提取技术，以确保过程的可持续性。评估了温度 (15−60 °C)、超声波 (US) 功率 (0−100 W) 和 US 应用时间 (5−50 分钟) 对新鲜和冻干丹拿葡萄渣的超声辅助提取 (UAE) 的影响. 阿联酋在美国浴中进行，在整个 50 分钟内通过评估提取动力学进行：总多酚含量 (TPC)、总单体花青素 (TMAC) 和总抗氧化能力 (AOC)。此外，还进行了 HPLC 分析以确定提取的化合物的特征。结果表明，UAE 增强了新鲜和冻干果渣的提取。在新鲜的果渣中，与传统提取物相比，UAE 提取物的 TPC 和 TMAC 平均含量高出 50%，而冷冻干燥果渣的提取量提高了 180%。在新鲜和冻干果渣中，美国申请允许提取与常规提取不同的化合物。这项工作表明，阿联酋有可能使丹纳特葡萄渣增值，但应仔细选择阿联酋条件以支持所需的提取物成分。