Revealing the flavor deterioration and key off-odor compounds in garlic paste during processing and storage: A
Weihe Zhu1, Lu Xiang1, Yunge Liu1
1Key Laboratory of Food Nutrition and Health in Universities of Shandong, College of Food Science and Engineering, Shandong Agricultural University, 61 Daizong Street, Tai'an 271018, Shandong, China.
None:
This study elucidated the flavor evolution of garlic paste during processing and storage. Integrating sensory and electronic nose analyses revealed significant flavor degradation after high-pressure and thermal processing following 40 h of storage, with acceptability scores decreasing by 52.17% and 63.04%, respectively. Principal component analysis (82.7% variance) effectively discriminated flavor profiles. Comprehensive volatile profiling identified 51 volatile organic compounds using gas chromatography-mass spectrometry and 53 through gas chromatography-ion mobility spectrometry, and 20 aroma-active compounds by gas chromatography-olfactometry. Partial least squares-discriminant analysis identified 10 key off-flavors based on odor activity, relative odor activity, and variable importance in projection. Notably, dimethyl trisulfide reached a maximum odor activity value of 2943.50 in stored thermally processed samples. Furthermore, high-pressure processing retained 91% of allicin. Mechanistically, flavor deterioration is likely driven by allicin degradation and the concurrent accumulation of S-methyl methanethiosulfinate breakdown products. These findings provide a scientific foundation for enhancing garlic flavor stability.
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