Identification and Distribution of New Impact Aldehydes in Toasted Oak Wood (<i>Quercus petraea</i>)
作者:Marie Courregelongue、Svitlana Shinkaruk、Andrei Prida、Philippe Darriet、Alexandre Pons
DOI:10.1021/acs.jafc.2c01828
日期:2022.9.21
(Wittig reaction) followed by semipreparative HPLC purification (chiral phase). Their detection thresholds in model wine solution were 60 ng/L (1) and 16 ng/L (2). Their distribution in toasted oak wood samples [GC-NCI-MS (NH3) analysis] ranged from some ng/g to 210 ng/g for (1) and 85 ng/g for (2). Finally, additional sensory experiments demonstrated the impact of newly identified aldehydes in toasted
本研究的目的是确定与橡木 ( Quercus petraea ) 烘烤强度相关的香气化合物。使用 GC-O-TOFMS 通过感官引导方法分析来自橡木样品(在不同温度-时间对下烘烤)的粗有机提取物,然后用半制备型 HPLC(反相)纯化。这种方法揭示了两个特定的气味区域 (OZ),让人联想到金属和酥皮点心。第一个 OZ 被鉴定为反式-4,5-epoxy-(E)-2-decenal (1) 通过共注射商业产品,而鉴定 (2 E ,4 E ,6 Z)-nonatrienal (2) 与油酥点心 OZ 相关,通过多步化学合成方法(维蒂希反应)和半制备 HPLC 纯化(手性相)进行了验证。它们在模型酒溶液中的检测阈值为 60 ng/L (1) 和 16 ng/L (2)。它们在烤橡木样品中的分布 [GC-NCI-MS (NH 3 ) 分析] 的范围为 (1) 的 ng/g 至 210 ng/g 和 (2)