Geographical origin of Sauvignon Blanc wines predicted by mass spectrometry and metal oxide based electronic nose |
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Authors: | Amalia Z Berna Stephen Trowell Wies Cynkar |
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Institution: | a CSIRO Entomology & Food Futures Flagship, PO Box 1700, Canberra, ACT 2601, Australia b CSIRO Mathematical and Information Sciences, Locked Bag 17, North Ryde, NSW 1670, Australia c The Australian Wine Research Institute, Waite Road, Urrbrae, PO Box 197, Adelaide, SA 5064, Australia |
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Abstract: | Analysis of 34 Sauvignon Blanc wine samples from three different countries and six regions was performed by gas chromatography-mass spectrometry (GC-MS). Linear discriminant analysis (LDA) showed that there were three distinct clusters or classes of wines with different aroma profiles. Wines from the Loire region in France and Australian wines from Tasmania and Western Australia were found to have similar aroma patterns. New Zealand wines from the Marlborough region as well as the Australian ones from Victoria were grouped together based on the volatile composition. Wines from South Australia region formed one discrete class. Seven analytes, most of them esters, were found to be the relevant chemical compounds that characterized the classes. The grouping information obtained by GC-MS, was used to train metal oxide based electronic (MOS-Enose) and mass spectrometry based electronic (MS-Enose) noses. The combined use of solid phase microextraction (SPME) and ethanol removal prior to MOS-Enose analysis, allowed an average error of prediction of the regional origins of Sauvignon Blanc wines of 6.5% compared to 24% when static headspace (SHS) was employed. For MS-Enose, the misclassification rate was higher probably due to the requirement to delimit the m/z range considered. |
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Keywords: | Sauvignon Blanc Electronic nose Gas chromatography-mass spectrometry Prediction |
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