Characterization of key aroma compounds in Chinese Guojing sesame-flavor Baijiu by means of molecular sensory science. (30th June 2019)

• Record Type: Journal Article
• Authors: Li, Hehe; Qin, Dan; Wu, Ziyang; Sun, Baoguo; Sun, Xiaotao; Huang, Mingquan; Sun, Jinyuan; Zheng, Fuping
• Is Part Of: Food chemistry. Volume 284(2019)
• Page Start: 100
• Page End: 107
• Publication Date: 2019-06-30
• Subjects: Benzenemethanethiol (Pub Chem CID: 7509) -- Ethyl 3-methylbutanoate (Pub Chem CID: 7945) -- Ethyl hexanoate (Pub Chem CID: 31265) -- Ethyl octanoate (Pub Chem CID: 7799) -- Dimethyl trisulfide (Pub Chem CID: 19310) -- Ethyl butanoate (Pub Chem CID: 7762) -- Ethyl pentanoate (Pub Chem CID: 10882) -- 2-Ethyl-6-methylpyrazine (Pub Chem CID: 26332) -- Ethyl 2-methylbutanoate (Pub Chem CID: 24020) -- Ethyl 3-phenylpropanoate (Pub Chem CID: 16237); Baijiu -- Gas chromatography–olfactometry -- GC×GC–TOF–MS -- Aroma extract dilution analysis -- Odor activity values -- Benzenemethanethiol; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2019.01.102
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: 509 volatile compounds were identified by GC × GC–TOF–MS. 61 aroma-active compounds were identified by GC–olfactometry. 60 compounds were quantified, and 39 of them show high odor activity values (OAVs ≥ 1). Benzenemethanethiol identified as a new major aroma-active compound. Benzenemethanethiol was reported in Baijiu for the first time. Abstract: Key odorants of Guojing sesame-flavor Baijiu were identified using the concept of molecular sensory science, including aroma extract dilution analysis (AEDA) based on gas chromatography–olfactometry (GC–O) combined with gas chromatography-mass spectrometry (GC–MS). A total of 509 volatile compounds were detected by comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry (GC × GC–TOF–MS). Sixty-one aroma-active compounds were identified via AEDA. Among them, two compounds with strong roasted aroma showed the highest flavor dilution (FD) factors of 19, 683 and 6561. By using pure standards, aroma tests, and GC–MS, the compound with FD = 19683 was identified as benzenemethanethiol, which is reported for the first time in Baijiu. Sixty compounds were quantified by means of internal standard curve method, and 39 of them had odor activity values (OAVs) ≥ 1. Ethyl hexanoate, ethyl octanoate, and dimethyl trisulfide showed the highest OAVs, indicating that they contribute significantly to the aroma of Guojing sesame-flavor Baijiu.