Processing tomato waste as a potential bioactive compounds source: phenolic compounds, antioxidant capacity and bioacessibility studies

ABSTRACT: A comparative study was perfomed with conventional and ultrasound assisted extraction on tomato processing waste. Ultrasound extraction exhibited slightly higher phenolic and flavonoids content, as well as higher ABTS + radical scavenging capacity (4.63 mg GAE.g-1, 0.96 mg RUE.g-1 and 27.90 μmol TE.g -1 respectively). On both extracts, a high percentage of flavonoids was lost during simulated digestion, resulting on a bioacessibility of approximately 13 %. Extracts presented good stability during storage conditions, which indicates a possible technological application.

摘要：本研究以番茄加工废弃物为研究对象，对比了传统提取法（conventional extraction）与超声辅助提取法（ultrasound assisted extraction）的提取效果。超声辅助提取法所得提取物的酚类与黄酮类物质含量略高，ABTS+自由基清除能力（ABTS+ radical scavenging capacity）也更强，分别可达4.63 mg没食子酸当量每克（Gallic Acid Equivalent，GAE·g⁻¹）、0.96 mg芦丁当量每克（Rutin Equivalent，RUE·g⁻¹）以及27.90 μmol Trolox当量每克（Trolox Equivalent，TE·g⁻¹）。两种提取物在模拟消化过程中均出现了大量黄酮类物质流失，最终导致生物可及性（bioaccessibility）约为13%。提取物在储存条件下表现出良好的稳定性，提示其具备潜在的技术应用价值。