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SPME method optimized by box-behnken design for impact odorants in reduced alcohol wines

Citation

Saha, B and Longo, R and Torley, P and Saliba, A and Schmidtke, L, SPME method optimized by box-behnken design for impact odorants in reduced alcohol wines, Foods, 7 Article 127. ISSN 2304-8158 (2018) [Refereed Article]


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Copyright Statement

Copyright 2018 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.3390/foods7080127

Abstract

The important sampling parameters of a headspace solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) procedure such as the extraction temperature, extraction time, and sample volume were optimized to quantify 23 important impact odorants in reduced alcohol red and white wines. A three-factor design of Box-Behnken experiments was used to determine the optimized sampling conditions for each analyte, and a global optimized condition at every ethanol concentration of interest determined using a desirability function that accounts for a low signal response for compounds. Shiraz and Chardonnay wines were dealcoholized from 13.7 and 12.2% v/v ethanol respectively, to 8 and 5% v/v, using a commercially available membrane-based technology. A sample set of the reduced alcohol wines were also reconstituted to their natural ethanol level to evaluate the effect of the ethanol content reduction on volatile composition. The three-factor Box-Behnken experiment ensured an accurate determination of the headspace concentration of each compound at each ethanol concentration, allowing comparisons between wines at varying ethanol levels to be made. Overall, the results showed that the main effect of extraction temperature was considered the most critical factor when studying the equilibrium of reduced alcohol wine impact odorants. The impact of ethanol reduction upon the concentration of volatile compounds clearly resulted in losses of impact odorants from the wines. The concentration of most analytes decreased with dealcoholization compared to that of the natural samples. Significant differences were also found between the reconstituted volatile composition and 5% v/v reduced alcohol wines, revealing that the dealcoholization effect is the result of a combination between the type of dealcoholization treatment and reduction in wine ethanol content.

Item Details

Item Type:Refereed Article
Keywords:reduced-alcohol wine, solid-phase microextraction, gas chromatography, chemometrics
Research Division:Engineering
Research Group:Food Sciences
Research Field:Wine Chemistry and Wine Sensory Science
Objective Division:Manufacturing
Objective Group:Processed Food Products and Beverages (excl. Dairy Products)
Objective Field:Beverages (excl. Fruit Juices)
UTAS Author:Longo, R (Dr Rocco Longo)
ID Code:127721
Year Published:2018
Web of Science® Times Cited:1
Deposited By:TIA - Research Institute
Deposited On:2018-08-10
Last Modified:2018-10-31
Downloads:72 View Download Statistics

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