Unraveling the contributing factors of stale odor in Longjing tea through a sensomics approach.
Food Chem
; 441: 138301, 2024 May 30.
Article
in En
| MEDLINE
| ID: mdl-38176144
ABSTRACT
Longjing tea is renowned for its fresh aroma and high value. However, during storage, the emergence of an off-flavor known as "stale odor" can significantly impact the flavor quality and economic benefits of Longjing tea. Yet, the specific volatiles responsible for this stale odor in Longjing tea remain unknown. In this study, Longjing tea samples with varying degrees of stale odor intensity were analyzed using simultaneous distillation extraction coupled with gas chromatography-mass spectrometry (SDE-GC-MS). Through odor activity value (OAV) and fractional omission testing, hexanoic acid and trans-2-nonenal were identified as the primary contributors to the stale odor. Moreover, the concentration of hexanoic acid was found to be valuable in predicting the intensity of the stale odor in Longjing tea. The oxidative degradation of linoleic acid was proved as the generation pathway of stale odor in Longjing tea. These findings provide essential theoretical principles for Longjing tea production and preservation.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Caproates
/
Volatile Organic Compounds
/
Odorants
Type of study:
Prognostic_studies
Language:
En
Journal:
Food Chem
/
Food chem
/
Food chemistry
Year:
2024
Document type:
Article
Country of publication:
United kingdom