刺葡萄皮色素的提取及性能测定

Pigment Extracted From Grape (Vitis davidii Fo x) Peel and Its Properties

对刺葡萄果皮色素的溶剂法提取工艺在单因素水平基础上进行了研究,并对提取所得色素的理化性质进行了测定。结果表明,以80%的乙醇水溶液为提取剂,料液比为1∶5,在80℃条件下提取1.5h,提取效果最好,提取得率为2.2%;对提取所得色素的理化性质进行的测定结果表明,所得色素色价高,耐酸性、耐光性好,Mg2+,Cu2+,K+等金属离子对其稳定性影响不大,具有很好的开发应用前景。

The extraction techniques of pigment from grape （Vitis davidii Foex） peel by solvent method were studied On the basis of single factor.The results suggested that the optimal technical conditions were as follows ： 80 % aqueous ethanol solution as extracting reagent, proportion of materials and extracting reagent was 1：5, temperature at 80 ℃, 1.5 h extracfion time, and the yield was 2.2 %. Furthermore, the physiochemical properties of the extracted pigment were determined. The results showed that the color value, anti-acid and lightfastness of the extracted pigment was good and the effects of metal ions such as Mg^2＋,Cu^2＋,K^＋ on pigment stability was little. Accordingly, the pigment of grape peel had good. development and application perspective.