Department of Chemistry, QOPNA, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal; Department of Chemistry, CICECO, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
Department of Chemistry, CICECO, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
Food Chem. 2017 Aug 15;229:276-285. doi: 10.1016/j.foodchem.2017.02.037. Epub 2017 Feb 10.
The volatile terpenic and norisoprenoids profile from elderflowers (Sambucus nigra L.) was established for two cultivars by multidimensional gas chromatography. From 47 monoterpenic, 13 sesquiterpenes and 5 norisoprenoids components, 38 are reported for the first time on elderflowers. Elderflower seasonality implies proper handling and storage conditions, for further processing, thus the impact of freezing, freeze-drying, air drying and vacuum packing, was evaluated on these potential aroma metabolites. The most suitable preservation methods, regarding the total metabolites content, were vacuum packing and freezing for intermediary storage times (24-32weeks) with a reported overall decrease of the volatile terpenic and norisoprenoids of up to 58.6%; and freezing, for longer period (52weeks), with a decrease of up to 47.4% (compared to fresh elderflowers). This study presents the most detailed terpenic and norisoprenoids elderflower profiling, and linalool oxides were proposed as markers for a more expedite assess to the impact of postharvest conditions.
采用多维气相色谱法建立了两种桑椹（Sambucus nigra L.）品种的挥发性萜类和类异戊二烯图谱。从 47 种单萜、13 种倍半萜和 5 种类异戊二烯成分中，有 38 种成分是首次在桑椹中报道的。桑椹的季节性意味着需要适当的处理和储存条件，以便进一步加工，因此评估了冷冻、冷冻干燥、空气干燥和真空包装对这些潜在香气代谢物的影响。就总代谢物含量而言，真空包装和冷冻是中间储存时间（24-32 周）最适宜的保存方法，挥发性萜类和类异戊二烯的总含量下降了 58.6%；冷冻是储存时间更长（52 周）的最佳方法，下降了 47.4%（与新鲜桑椹相比）。本研究对桑椹的萜类和类异戊二烯成分进行了最详细的分析，并提出氧化芳樟醇作为评估采后条件影响的更快捷指标。
