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外源多酚添加条件下干红葡萄酒颜色和花色苷特性研究

Effects of Exogenous Polyphenols Addition on Color and Anthocyanins of Dry Red Wine

  • 摘要: 颜色是红葡萄酒重要的感官特征和质量评价指标,花色苷是红葡萄酒呈色、稳定和营养功能的重要物质基础。既往研究极少探讨外源添加天然色素对红葡萄酒颜色质量和花色苷的影响。选取赤霞珠干红葡萄酒为研究对象,于酒精发酵前和发酵后分别添加天然色素Ⅰ和天然色素Ⅱ2种色素,并以添加黄岑苷、绿原酸和没食子酸3种多酚为对照,探究对葡萄酒颜色特征、花色苷种类与含量的影响。结果发现:在发酵前添加天然色素Ⅰ和Ⅱ使得酒体颜色加深、红色色调加强、花色苷含量增加。在发酵后添加以上多酚对葡萄酒颜色和花色苷的影响弱于发酵前添加,但添加天然色素Ⅰ仍然有利于花色苷含量的保持,只是效果弱于发酵前添加。其余多酚物质处理对供试酒样颜色品质影响较小。研究结果表明发酵前添加多酚物质更有利于红葡萄酒颜色品质的提升和稳定、花色苷含量的保持和稳定,天然色素Ⅰ是相对最优质的辅色剂。

     

    Abstract: Color is an important sensory characteristic and quality evaluation index of red wine; while anthocyanins are the important material basis for the color, stability and nutritional functions of red wine. The effect of exogenous addition of natural pigments on the color quality and anthocyanins of red wine was rarely discussed in previous studies. Cabernet Sauvignon dry red wine was added natural pigments Ⅰ and Ⅱ, as well as three kinds of polyphenols, baicalin, chlorogenic acid and gallic acid which have been studied intensively as control, before and after alcoholic fermentation to explore the effects of the basic physical and chemical properties, color quality and anthocyanins of the wine samples. The results showed that the color of the wine was deepened, the redness hue was intensified and the anthocyanin content was increased along with the adding of natural pigment Ⅰ and natural pigment Ⅱ before alcoholic fermentation. In contrast, the effect of the additions after alcoholic fermentation were weaker than that before alcoholic fermentation. The adding of natural pigment Ⅰ after alcoholic fermentation was beneficial to the stability of anthocyanins, but the effect was weaker than that before alcoholic fermentation. The treatment of other polyphenols had less effect on the color quality of the tested wine. The research result clarified that the addition of polyphenols before alcoholic fermentation was more beneficial for the improvement and stability of the color quality of red wine, as well as for the stability of anthocyanins. Relatively, natural pigment Ⅰ was the best copigment.

     

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