Song Mei, Fuentes Claudio, Loos Athena, Tomasino Elizabeth
Department of Food Science & Technology, Oregon State University, Corvallis, OR 97331, USA.
Department of Statistics, Oregon State University, Corvallis, OR 97331, USA.
Foods. 2018 Feb 21;7(2):27. doi: 10.3390/foods7020027.
Monoterpene compounds contribute floral and fruity characters to wine and are desired by grape growers and winemakers for many white wines. However, monoterpene isomers, especially monoterpene enantiomers, have been little explored. It is possible to identify and quantitate 17 monoterpene isomers in 148 varietal wines from eight grape varieties; Chardonnay, Gewürztraminer, Muscat, Pinot gris, Riesling, Sauvignon blanc, Torrontes, and Viognier in two vintages by Headspace solidphase microextraction multidimensional gas chromatography mass spectrometry (HS-SPME-MDGC-MS). Results obtained from general linear models and discriminant analysis showed significant differences for the isomer profiles and enantiomer fractions among the eight grape varieties and four wine styles. The high values from the fitted line show low variation in enantiomeric differences based on variety. These results provide an overview of the monoterpene isomers of wide varietal wines, and support that isomer profiles and enantiomer fractions could differentiate our wines by varietal and wine style.
单萜类化合物为葡萄酒赋予花香和果香特征，是许多白葡萄酒的葡萄种植者和酿酒师所期望的。然而，单萜异构体，尤其是单萜对映体，尚未得到充分研究。通过顶空固相微萃取多维气相色谱 - 质谱联用仪（HS-SPME-MDGC-MS），可以鉴定和定量来自八个葡萄品种（霞多丽、琼瑶浆、麝香、灰皮诺、雷司令、长相思、托伦特斯和维欧尼）的148种单一品种葡萄酒中的17种单萜异构体。在两个年份中获得的结果表明，一般线性模型和判别分析的结果显示，八个葡萄品种和四种葡萄酒风格之间的异构体谱和对映体分数存在显著差异。拟合线的高值表明基于品种的对映体差异变化较小。这些结果概述了广泛品种葡萄酒中的单萜异构体，并支持异构体谱和对映体分数可以按品种和葡萄酒风格区分葡萄酒。
