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Analysis of strawberry volatiles using comprehensive two-dimensional gas chromatography with headspace solid-phase
Angela Williams1, Danielle Ryan, Alexandra Olarte Guasca
1School of Applied Sciences, RMIT University, G.P.O. Box 2476V, Melbourne, Victoria 3001, Australia.
Summary
This study developed an enantioselective GCxGC method to analyze strawberry volatiles, identifying key enantiomers and changes in volatile compounds during storage. This advances understanding of strawberry flavor profiles.
Area of Science:
- Food Science
- Analytical Chemistry
- Organic Chemistry
Background:
- Strawberry flavor is complex, influenced by volatile organic compounds.
- Enantioselective analysis is crucial for understanding stereospecific flavor perception.
- Existing methods may not fully resolve complex volatile profiles.
Purpose of the Study:
- To develop an enantioselective comprehensive two-dimensional gas chromatography (GCxGC) method for strawberry volatiles.
- To compare volatile profiles across different strawberry cultivars.
- To investigate changes in volatile compounds of strawberries after harvest and during storage.
Main Methods:
- Solid-phase microextraction (SPME) for volatile sampling.
- Enantioselective comprehensive two-dimensional gas chromatography (GCxGC) for separation and analysis.
- Semi-quantitative analysis of detected volatile compounds.
Main Results:
- The developed GCxGC method demonstrated good repeatability and reproducibility.
- Key enantiomers, including (-)-2,5-dimethyl-4-hydroxy-(2H)-furan-3-one (DMHF) and S-linalool, were identified.
- Post-harvest storage led to decreased benzaldehyde and methyl hexanoate, with increased DMHF and nerolidol.
Conclusions:
- Enantioselective GCxGC is effective for analyzing strawberry volatiles and differentiating enantiomers.
- Specific enantiomers contribute significantly to strawberry flavor.
- Storage significantly alters the volatile profile of strawberries, impacting flavor characteristics.