title: Characterisation of aroma profiles of commercial sufus by odour activity value, gas chromatography-olfactometry, aroma recombination and omission studies.
abstract: Sufu is a solid-state fermented product made from soya beans. For the sake of quality control and regulation purposes, it is essential to be able to identify key odorants of various commercial sufus. To identify the aroma-active compounds in sufus, gas chromatography-olfactometry/aroma extract dilution analysis (GC-O/AEDA) was performed, and odour activity value (OAV) was estimated. The correlations between aroma profiles and identified aroma-active compounds were also investigated by principal component analysis. Results showed that 35 aroma-active compounds were detected through OAV calculation, while 28 compounds were identified by using GC-O/AEDA. Quantitative descriptive analysis revealed that aroma recombination model based on OAV calculation was more similar to original sufu in terms of aroma comparing to aroma recombination model based on GC-O/AEDA. Omission experiments further confirmed that the aroma compounds, such as ethyl butanoate, ethyl 2-methylbutanoate, ethyl hexanoate, (E,E)-2,4-decadienal and 2,6-dimethylpyrazine, contributed most significantly to the characteristic aroma of a commercial sufu.
authors: a Department of Perfume and Aroma Technology , School of Perfume and Aroma Technology, Shanghai Institute of Technology , Haiquan Road No. 100, Shanghai , SC 201400 , P.R. China.
authors: Zuobing
authors: Z
authors: Xiao
authors: Yi
authors: Y
authors: Shang
authors: Feng
authors: F
authors: Chen
authors: Yunwei
authors: Y
authors: Niu
authors: Yongbo
authors: Y
authors: Gu
authors: Shengjiang
authors: S
authors: Liu
authors: Jiancai
authors: J
authors: Zhu
mesh_terms: D000447:Aldehydes / Q000032:analysis; D002087:Butyrates / Q000032:analysis; D002849:Chromatography, Gas; D005285:Fermentation; D009812:Odorants / Q000032:analysis*; D064367:Olfactometry; D025341:Principal Component Analysis; D011719:Pyrazines / Q000032:analysis; D045730:Soy Foods / Q000032:analysis*
chemical_list: D000447:Aldehydes; D002087:Butyrates; D011719:Pyrazines; C057349:2,4-decadienal; C075524:2,5-dimethylpyrazine
keywords: GC-O/AEDA; OAV; aroma recombination and omission; commercial sufu