中文摘要：

目的：通过同时蒸馏萃取（SDE）、顶空固相微萃取（SPME）及吹扫捕集（P＆T）技术结合气相色谱-嗅闻-质谱（GC-O-MS）技术对传统酸面团制备的馒头特征风味成分进行分析,并初步探讨特征风味形成机理。创新点：首次采用不同风味物质分析技术探索传统酸面团制备的馒头关键风味成分。方法：采用同时SDE、SPME及P＆T方法,对不同传统酸面团制备的馒头特征风味物质进行分析。结论：SDE结果显示,反式-2-壬烯醛和反式-2,4-癸二烯醛为传统酸面团馒头中关键风味成分。SPME和P＆T方法表明乙醇和醋酸是关键风味物质。因此,需要结合不同技术方法,全面分析传统酸面团制备的馒头中特征风味成分。

英文摘要：

Aroma of Chinese steamed bread（CSB） is one of the important parameters that determines the overall quality attributes and consumer acceptance. However, the aroma profile of CSB still remains poorly understood, mainly because of relying on only a single method for aroma extraction in previous studies. Therefore, the objective of this study was to determine the volatile aroma compounds of five different samples of CSB using three different aroma extraction methods, namely solid-phase microextraction（SPME）, simultaneous distillation–extraction（SDE）, and purge and trap（PT）. All samples showed a unique aroma profile, which could be attributed to their unique microbial consortia.（E）-2-Nonenal and（E,E）-2,4-decadienal were the most prevalent aromatic compounds revealed by SDE, which have not been reported previously, while ethanol and acetic acid proved to be the most dominant compounds by both SPME and PT. Our approach of combining three different aroma extraction methods provided better insights into the aroma profile of CSB, which had remained largely unknown in previous studies.