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  • Correlating wine quality indicators to chemical and sensory measurements.

Correlating wine quality indicators to chemical and sensory measurements.

Molecules (Basel, Switzerland) (2015-05-20)
Helene Hopfer, Jenny Nelson, Susan E Ebeler, Hildegarde Heymann
ABSTRACT

Twenty-seven commercial Californian Cabernet Sauvignon wines of different quality categories were analyzed with sensory and chemical methods. Correlations between five quality proxies-points awarded during a wine competition, wine expert scores, retail price, vintage, and wine region-were correlated to sensory attributes, volatile compounds, and elemental composition. Wine quality is a multi-faceted construct, incorporating many different layers. Depending on the quality proxy studied, significant correlations between quality and attributes, volatiles and elements were found, some of them previously reported in the literature.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Acetaldehyde, natural, FG
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, anhydrous, ≥99.5%
Sigma-Aldrich
2-Undecanone, 99%
Sigma-Aldrich
Nitric acid, ACS reagent, ≥90.0%
Sigma-Aldrich
Acetaldehyde, ≥99%, meets FCC analytical specification
Sigma-Aldrich
(±)-2-Methylbutyric acid, natural, ≥98%, FG
Sigma-Aldrich
Nitric acid, 70%, purified by redistillation, ≥99.999% trace metals basis
Supelco
Ethanol standards 10% (v/v), 10 % (v/v) in H2O, analytical standard
Sigma-Aldrich
Propionic acid, BioReagent, suitable for insect cell culture, ~99%
Sigma-Aldrich
Acetaldehyde, ACS reagent, ≥99.5%
Sigma-Aldrich
2-Undecanone, ≥98%, FCC, FG
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, meets USP testing specifications
Sigma-Aldrich
Propionic acid, natural, 99%, FG
Sigma-Aldrich
Ethyl 2-methylbutyrate, 99%
Sigma-Aldrich
Propionic acid, ≥99.5%, FCC, FG
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, ACS spectrophotometric grade, 95.0%
Sigma-Aldrich
2-Undecanone, natural, FCC, FG
Sigma-Aldrich
Propionic acid, ACS reagent, ≥99.5%
Sigma-Aldrich
Ethyl 2-methylbutyrate, ≥98%, FCC, FG
Sigma-Aldrich
Ethyl 2-methylbutyrate, natural, mixture of enantiomers, ≥98%, FCC, FG
Sigma-Aldrich
Ethyl alcohol, Pure, 200 proof, ACS reagent, meets USP testing specifications, Excise Tax-free, Permit for use required
Sigma-Aldrich
Ethyl alcohol, Pure, 190 proof, ACS reagent, meets USP testing specifications, Excise Tax-free, Permit for use required
Sigma-Aldrich
Ethyl alcohol, Pure, 160 proof, Excise Tax-free, Permit for use required
Sigma-Aldrich
(−)-Linalool, ≥95.0% (sum of enantiomers, GC)
Sigma-Aldrich
Propionic acid, puriss. p.a., ≥99.5% (GC)
Sigma-Aldrich
Sodium chloride, BioXtra, ≥99.5% (AT)
Sigma-Aldrich
Hexanoic acid, ≥98%, FCC, FG
Sigma-Aldrich
Linalool, 97%
Sigma-Aldrich
Hydrochloric acid solution, ~6 M in H2O, for amino acid analysis
Sigma-Aldrich
Sodium chloride solution, BioUltra, for molecular biology, ~5 M in H2O