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Profile changes in banana flavour volatiles during low temperature drying
Bithika Saha1, Martin P Bucknall2, Jayashree Arcot1
1School of Chemical Engineering, University of New South Wales, NSW 2052, Australia.
Food Research International (Ottawa, Ont.)
|March 28, 2018
Summary
Low temperature heat pump drying significantly impacts banana flavor compounds, with esters showing substantial losses (25-87%). Drying conditions and compound volatility influence the retention of volatile flavor compounds.
Area of Science:
- Food Science
- Analytical Chemistry
- Chemical Engineering
Background:
- Preserving volatile flavor compounds during food drying is crucial for product quality.
- Low-temperature heat pump drying offers potential energy savings but its impact on flavor needs investigation.
Purpose of the Study:
- To quantify changes in key volatile flavor compounds in bananas during low-temperature heat pump drying.
- To understand the influence of drying conditions on flavor compound retention.
Main Methods:
- Headspace gas chromatography mass spectrometry (HS-GC-MS) was employed.
- Analysis of ten selected volatile compounds across different chemical classes.
- Drying experiments were conducted under three distinct low-temperature heat pump conditions.
Main Results:
- Ester compounds exhibited the most significant losses, ranging from 25% to 87%.
- Three distinct depletion patterns were observed: rapid initial reduction (esters, aldehydes), initial increase followed by decrease (alcohols), and minimal change (high molecular weight compounds).
- Selective diffusion and inherent volatility influenced the extent of flavor retention.
Conclusions:
- Low-temperature heat pump drying significantly alters banana volatile profiles, particularly esters.
- Drying parameters and compound properties dictate flavor compound stability and retention.
- Further optimization of drying conditions is necessary to maximize flavor compound preservation.
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