Key odor impact compounds in three yeast extract pastes
Kritika Mahadevan1, Linda Farmer
1Department of Food Science, Queen's University Belfast, Belfast, BT9 5PX, United Kingdom.
Journal of Agricultural and Food Chemistry
|September 14, 2006
Summary
Flavor profiles of yeast extract pastes vary significantly due to differences in key odor compounds like furans and heterocyclic sulfur compounds. These variations stem from supplier, processing, and batch differences, impacting final product flavor.
Area of Science:
- Food Science
- Analytical Chemistry
Background:
- Yeast extract is a common ingredient in food products, contributing savory (umami) flavors.
- The volatile compounds responsible for yeast extract's aroma are complex and can vary.
- Understanding these variations is crucial for consistent flavor profiles in food manufacturing.
Purpose of the Study:
- To compare the volatile odor profiles of different yeast extract pastes.
- To identify key odor-active compounds contributing to flavor differences.
- To investigate the impact of supplier, treatment, and batch on yeast extract aroma.
Main Methods:
- Gas chromatography-mass spectrometry (GC-MS) analysis of volatile compounds.
- Sensory evaluation of yeast extract pastes.
- Comparison of odor profiles across different yeast extract types and suppliers.
Main Results:
- Significant differences in odor intensity and composition were observed among yeast extract pastes.
- Key odorants identified include 2-methyl-3-furanthiol, heterocyclic sulfur compounds, pyrazines, and methional.
- Variations were noted not only between suppliers but also between different treatments and batches from the same supplier.
Conclusions:
- Yeast extract paste flavor is influenced by variations in volatile compounds.
- Precursor concentrations and processing conditions likely contribute to observed flavor differences.
- Consistent flavor in end products requires careful control over yeast extract sourcing and production.
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