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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

Supelco

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

Sigma-Aldrich

Hydrochloric acid solution, 1.0 N, BioReagent, suitable for cell culture

Supelco

Ethanol standards 10% (v/v), 10 % (v/v) in H₂O, analytical standard

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Sodium chloride, Molecular Biology, DNase, RNase, and protease, none detected, ≥99% (titration)

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

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Sodium chloride, tablet

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Sodium chloride solution, 5 M in H₂O, BioReagent, Molecular Biology, suitable for cell culture

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Hydrochloric acid, 36.5-38.0%, BioReagent, Molecular Biology

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Sodium chloride, BioXtra, ≥99.5% (AT)

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

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Sodium chloride solution, 5 M

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Linalool, 97%

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

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Sodium chloride, BioUltra, Molecular Biology, ≥99.5% (AT)

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Hexanoic acid, ≥98%, FCC, FG

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

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

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Hexanoic acid, ≥99%

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Acetic acid, natural, ≥99.5%, FG

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Acetic acid, ≥99.5%, FCC, FG

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Linalool, ≥97%, FCC, FG

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Sodium chloride, 99.999% trace metals basis

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Acetaldehyde solution, 5 M in THF

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

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Hydrochloric acid solution, 0.02 M

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Acetic acid, ≥99.7%

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Hydrochloric acid solution, 0.01 M

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Ethanol, JIS special grade, 94.8-95.8%

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Acetic acid, JIS special grade, ≥99.7%