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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

Hydrogen chloride solution, 3 M in cyclopentyl methyl ether (CPME)

Sigma-Aldrich

Nitric-¹⁴N acid solution, ~10 N in H₂O, 99.99 atom % ¹⁴N

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

Hydrochloric acid solution, 32 wt. % in H₂O, FCC

Sigma-Aldrich

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

Sigma-Aldrich

Linalool, ≥97%, FCC, FG

Sigma-Aldrich

Acetic acid, ≥99.5%, FCC, FG

Sigma-Aldrich

Acetic acid, natural, ≥99.5%, FG

Sigma-Aldrich

Acetaldehyde solution, 50 wt. % in ethanol

Sigma-Aldrich

Sodium chloride, 99.999% trace metals basis

Sigma-Aldrich

Ethanol, anhydrous, denatured

Sigma-Aldrich

Sodium chloride-³⁵Cl, 99 atom % ³⁵Cl

Sigma-Aldrich

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

Sigma-Aldrich

Acetaldehyde solution, 40 wt. % in isopropanol

Sigma-Aldrich

Acetic acid-¹²C₂, 99.9 atom % ¹²C

Sigma-Aldrich

Sodium chloride solution, 0.85%

Sigma-Aldrich

Acetaldehyde solution, 40 wt. % in H₂O

Sigma-Aldrich

Hexanoic acid, ≥98%, FCC, FG

Sigma-Aldrich

2-Methylbutyric acid, ≥98%, FG

Sigma-Aldrich

Linalool, 97%

Sigma-Aldrich

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

Sigma-Aldrich

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

Supelco

Hydrochloric acid solution, volumetric, 0.1 M HCl (0.1N), endotoxin free

Sigma-Aldrich

Sodium chloride solution, 5 M

Sigma-Aldrich

Sodium chloride solution, 5 M in H₂O, BioReagent, for molecular biology, suitable for cell culture

Sigma-Aldrich

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

Sigma-Aldrich

Sodium chloride, tablet

Sigma-Aldrich

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

Sigma-Aldrich

Sodium chloride, BioXtra, ≥99.5% (AT)