Determination of Methoxypyrazines in Red Wines by Stable Isotope Dilution Gas Chromatography-Mass Spectrometry

Allen, Malcolm S.; Lacey, Michael J.; Boyd, Stephen J.

doi:10.1021/jf00044a030

Cited by 132 publications

(130 citation statements)

References 11 publications

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“…We have seen similar results in other recent studies; for example, in 2007, >15 pg/mL IBMP in only two of 13 sites in the Finger Lakes (Ryona et al 2008). The percentage of wines with IBMP exceeding 15 pg/mL is comparable to the percentage reported for warmer climates (Allen et al 1994, Chapman et al 2004, even though MP concentrations are reportedly higher in cool regions.…”

Section: Discussionsupporting

confidence: 90%

“…Even with these caveats, the lack of predictive ability of cluster light exposure in the multisite study is not surprising; the differences in IBMP between fully shaded and fully exposed fruit within a vineyard do not usually exceed a factor of two (Marais et al 1999, Ryona et al 2008, Scheiner et al 2010. However, the variation in IBMP among and within regions, including in our current study, is reported to exceed an order of magnitude (Allen et al 1994, Ryona et al 2008. Furthermore, in five of the single-site models for IBMP at 50 DAA, cluster light exposure, reported as cluster exposure flux availability (CEFA), was negatively correlated with IBMP but loaded to the same latent variables as the x variables associated with vigor.…”

Section: Discussioncontrasting

confidence: 40%

“…In general, grapes and wines produced in cool regions and in cooler years are reported to have higher MP concentrations (Allen et al 1994, Falcão et al 2007). Higher temperatures during the ripening period are thought to enhance MP degradation, leading to lower concentrations at harvest .…”

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confidence: 99%

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Modeling Impacts of Viticultural and Environmental Factors on 3-Isobutyl-2-Methoxypyrazine in Cabernet franc Grapes

Scheiner¹,

Heuvel²,

Pan³

et al. 2011

Am. J. Enol. Vitic.

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Abstract:A study was conducted to determine the key environmental and viticultural variables affecting the concentration of 3-isobutyl-2-methoxypyrazine (IBMP) in Cabernet franc grapes. Berries were sampled from individual vines at 30 days after anthesis (DAA), 50 DAA, and harvest from 10 and Important variables identified for modeling IBMP at 50 DAA were those associated with vine vigor, which was positively correlated with IBMP accumulation. Cluster light exposure did not explain differences in IBMP accumulation across sites, but it was important for modeling smaller differences within some sites. IBMP decrease could not be satisfactorily modeled across multiple sites, but within sites the decrease was most consistently correlated with classic fruit maturity indices (total soluble solids [TSS], TSS*pH 2 ). The intensity of herbaceous aromas in wines produced from each site was not correlated with IBMP concentration, but multivariate models indicated that lower vine water status was the best predictor of increased herbaceousness.

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Section: Discussionsupporting

confidence: 90%

Section: Discussioncontrasting

confidence: 40%

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Modeling Impacts of Viticultural and Environmental Factors on 3-Isobutyl-2-Methoxypyrazine in Cabernet franc Grapes

Scheiner¹,

Heuvel²,

Pan³

et al. 2011

Am. J. Enol. Vitic.

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“…Allen et al 12) have reported a climatic effect on the isobutylMP contents of Australian and New Zealand Cabernet Sauvignon-based red wines by examining the relationship with the mean temperature in January, the ripening month. Therefore, we also examined such a correlation with the climatic conditions in September, the ripening month in Japan (Table III).…”

Section: Correlation Hetween the Isohutyl M P Levels In Red Wines Andmentioning

confidence: 99%

Methoxypyrazine Content of Japanese Red Wines

Hashizume

Umeda

1996

Bioscience, Biotechnology, and Biochemistry

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“…These compounds include monoterpenes, C 13 norisoprenoids (Falqué, Fernández, & Dubourdieu, 2002;Oliveira, Araú jo, Pereira, Maia, & Amaral, 2004), thiols (Darriet, Tominaga, Demole, & Dubourdieu, 1993;Tominaga, Guyot, Peyrot des Gachons, & Dubourdieu, 2000) and methoxypyrazines (Allen, Lacey, & Boyd, 1994;Allen, Lacey, Harris, & Brown, 1991;Sala, Mestres, Marti, Busto, & Guasch, 2002).…”

Section: Introductionmentioning

confidence: 99%

Classification of Boal, Malvazia, Sercial and Verdelho wines based on terpenoid patterns

2007

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Thirty-six Madeira wine samples from Boal, Malvazia, Sercial and Verdelho white grape varieties were analyzed in order to estimate the free fraction of monoterpenols and C 13 norisoprenoids (terpenoid compounds) using dynamic headspace solid phase micro-extraction (HS-SPME) technique coupled with gas chromatography-mass spectrometry (GC-MS). The average values from three vintages (1998)(1999)(2000) show that these wines have characteristic profiles of terpenoid compounds. Malvazia wines exhibits the highest values of total free monoterpenols, contrary to Verdelho wines which had the lowest levels of terpenoids but produced the highest concentration of farnesol. The use of multivariate analysis techniques allows establishing relations between the compounds and the varieties under investigation. Principal component analysis (PCA) and linear discriminant analysis (LDA) were applied to the obtained matrix data. A good separation and classification power between the four groups as a function of their varietal origin was observed.

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Determination of Methoxypyrazines in Red Wines by Stable Isotope Dilution Gas Chromatography-Mass Spectrometry

Cited by 132 publications

References 11 publications

Modeling Impacts of Viticultural and Environmental Factors on 3-Isobutyl-2-Methoxypyrazine in Cabernet franc Grapes

Modeling Impacts of Viticultural and Environmental Factors on 3-Isobutyl-2-Methoxypyrazine in Cabernet franc Grapes

Methoxypyrazine Content of Japanese Red Wines

Classification of Boal, Malvazia, Sercial and Verdelho wines based on terpenoid patterns

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