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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

Linalool, 97%

Sigma-Aldrich

Acetic acid, for luminescence, BioUltra, ≥99.5% (GC)

Sigma-Aldrich

Hydrochloric acid solution, ~6 M in H₂O, for amino acid analysis

Sigma-Aldrich

Sodium chloride, BioUltra, for molecular biology, ≥99.5% (AT)

Sigma-Aldrich

Sodium chloride solution, BioUltra, for molecular biology, ~5 M in H₂O

Sigma-Aldrich

2-Methylbutyric acid, 98%

Sigma-Aldrich

Hexanoic acid, ≥99%

Sigma-Aldrich

Sodium chloride, ≥99%, AR grade

Sigma-Aldrich

Acetaldehyde solution, natural, 50 wt. % ethanol, FG

Sigma-Aldrich

Acetic acid, ≥99.5%, FCC, FG

Sigma-Aldrich

Linalool, ≥97%, FCC, FG

Sigma-Aldrich

Sodium chloride, 99.999% trace metals basis

Sigma-Aldrich

2-Methylbutyric acid, ≥98%, FG

Sigma-Aldrich

Sodium chloride, AnhydroBeads^™, −10 mesh, 99.999% trace metals basis

Sigma-Aldrich

Ethanol Fixative 80% v/v, suitable for fixing solution (blood films)

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Hydrochloric acid, 36.5-38.0%, BioReagent, for molecular biology

Sigma-Aldrich

Sodium chloride-³⁵Cl, 99 atom % ³⁵Cl

Sigma-Aldrich

Sodium chloride, random crystals, optical grade, 99.9% trace metals basis

Sigma-Aldrich

Acetic acid-¹²C₂, 99.9 atom % ¹²C

Sigma-Aldrich

Sodium chloride solution, 0.85%

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Acetaldehyde solution, 40 wt. % in H₂O

Sigma-Aldrich

Acetic acid, natural, ≥99.5%, FG

Sigma-Aldrich

Acetaldehyde solution, 50 wt. % in ethanol

Sigma-Aldrich

Hexanoic acid, ≥98%, FCC, FG

Sigma-Aldrich

Sodium chloride, tablet

Sigma-Aldrich

Sodium chloride, BioXtra, ≥99.5% (AT)

Sigma-Aldrich

Sodium chloride, meets analytical specification of Ph. Eur., BP, USP, 99.0-100.5%

Sigma-Aldrich

Sodium chloride, BioReagent, suitable for cell culture, suitable for insect cell culture, suitable for plant cell culture, ≥99%

Sigma-Aldrich

Sodium chloride, for molecular biology, DNase, RNase, and protease, none detected, ≥99% (titration)

Sigma-Aldrich

Sodium chloride solution, 0.9% in water, BioXtra, suitable for cell culture