Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy.
Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy.
Food Res Int. 2017 Sep;99(Pt 1):298-307. doi: 10.1016/j.foodres.2017.05.036. Epub 2017 May 30.
Distillation wastewaters (DWWs) are generated during the essential oil steam distillation from aromatic herbs. Despite of growing interest on novel source of natural antioxidant compounds as food additives, studies on DWWs are scarse. Herein, the potential of DWWs produced by the distillation of packaged fresh basil, rosemary and sage wastes was evaluated by chemical and antioxidant characterization. HPLC-DAD-HRMS profiling revealed that DWWs contain water-soluble phenolic compounds, mainly caffeic acid derivatives and flavonoid glycosides, with rosmarinic acid (RA) as predominant components (29-135mg/100mL). DWWs demonstrated high levels of total phenolic compounds (TPC, 152-443mg GAE/100mL) and strong antioxidant capacities, in ORAC, DPPH and ABTS assays (1101-4720, 635-4244 and 571-3145μmol TE/100mL, respectively). Highly significant correlations of TEAC values with TPC and RA contents revealed that phenolic compounds and high RA content were responsible of DWWs antioxidant properties.Thus, DWWs are proposed as a new promising source of natural food additives and/or functional ingredients for cosmetic, nutraceutical and food applications.
蒸馏废水（DWWs）是在从芳香草本植物进行精油蒸汽蒸馏过程中产生的。尽管人们对新型天然抗氧化化合物作为食品添加剂的来源越来越感兴趣，但对 DWWs 的研究却很少。在此，通过化学和抗氧化特性评估，评估了由包装新鲜罗勒、迷迭香和鼠尾草废物蒸馏产生的 DWWs 的潜力。HPLC-DAD-HRMS 分析表明，DWWs 含有水溶性酚类化合物，主要是咖啡酸衍生物和类黄酮糖苷，以迷迭香酸（RA）为主要成分（29-135mg/100mL）。DWWs 表现出高含量的总酚类化合物（TPC，152-443mg GAE/100mL）和强大的抗氧化能力，在 ORAC、DPPH 和 ABTS 测定中（1101-4720、635-4244 和 571-3145μmol TE/100mL，分别）。TEAC 值与 TPC 和 RA 含量之间存在高度显著的相关性，表明酚类化合物和高 RA 含量是 DWWs 抗氧化特性的原因。因此，DWWs 被提议作为天然食品添加剂和/或功能性成分的新来源，用于化妆品、营养保健品和食品应用。
