Maturity-Dependent Volatile Flavor Profiling of Baked Potatoes via HS-SPME-GC-MS, Multivariate Statistical Analysis,...

Area of Science:

• Food Science
• Analytical Chemistry
• Sensory Science

Background:

• Volatile compounds significantly influence food flavor profiles.
• Potato maturity is a critical factor affecting its sensory characteristics.

Purpose of the Study:

• To investigate the impact of maturity on the volatile flavor profile of baked potatoes.
• To identify key volatile compounds indicative of different potato maturities.
• To explore the molecular interactions of flavor compounds with olfactory receptors.

Main Methods:

• Headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry (HS-SPME-GC-MS) for volatile compound identification.
• Sensory evaluation and multivariate statistical analysis (e.g., VIP scores) to determine significant compounds.
• Relative Odor Activity Value (ROAV) calculation to pinpoint key aroma contributors.
• Molecular docking simulations to analyze compound-receptor interactions.

Main Results:

• Identification of 99 volatile compounds in baked potatoes.
• Discovery of 36 statistically significant compounds differentiating maturities (VIP > 1, p < 0.05).
• Pinpointing four key indicator compounds: 2-ethyl-3,5-dimethylpyrazine, 2,6-diethylpyrazine, ethyl acetate, and benzeneacetaldehyde.
• Elucidation of molecular interactions between pyrazines and human olfactory receptor OR5K1.

Conclusions:

• Potato maturity is a determinant of baked potato flavor complexity.
• Specific volatile compounds serve as reliable markers for potato maturity.
• Understanding molecular interactions provides a basis for predicting flavor perception.