pea fermentation, yeast, gas chromatography-ion mobility spectrometry, volatile flavor compounds, relative odor activity value, partial least squares-discrimination analysis, Food processing and manufacture, TP368-456

To investigate the effects of Angel yeast, Meyerozyma guilliermondii, Saccharomyces cerevisiae, Zygosaccharomyces rouxii and Candida parapsilosis fermentation on volatile flavour compounds in bean paste, the volatile flavour substances of fermented bean soup paste were analyzed by gas chromatography-ion mobility spectrometry (GC-IMS) technique using unfermented bean soup paste as a control group. The relative odour activity value (ROAV) method was used to determine the key flavour components. Principal component analysis (PCA) and partial least squares-discrimination analysis (PLS-DA) were used to comprehensively evaluate the aroma of fermented bean soup paste. A total of 50 volatile compounds were identified, which were primarily esters and alcohols in six fermented bean sauces. These compounds contribute to the distinct mellow, fruity, and malty flavour profiles characteristic of these sauces. The types and concentrations of volatile compounds in different fermented bean sauces exhibited statistically significant differences (P