葡萄皮色素的提取及稳定性研究
首发时间:2006-06-08
摘要:对从葡萄皮中提取天然葡萄色素的方法和条件进行研究,并且在各种不同条件及环境下,对它的性能和稳定性进行测试,结果表明,该色素易溶于有机溶剂,在70%的乙醇中溶解度较大,在可见光区最大吸收波长为560nm。对光、热的稳定性较好,但该色素的抗氧化能力差,在使用该色素时,应避免与氧化性物质接触。在酸性条件下稳定性较好,且色泽鲜艳,纯正,在中性介质中接近蓝色,而在碱性介质中出现褐色!
关键词: 葡萄 色素 稳定性
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The grape skin dye withdraw and the stability research
Abstract: The results of,researching the methods and conditions of extracting natural grape pigment from grape skin,and testing its performance and stability in a variety of conditions and circumstances, show that the pigment is soluble in organic solvents.In 70% ethanol, the Solubility is big.The biggest absorption wavelength is 560nm in the visible area.Its stability is better to light and therm,but its ability of resisting to be oxidation is bad.When using the pigment,we should avoid touching with oxidation substance.Its stability is good in acidic conditions, and the color is bright.The color is near blue in the neutral medium ,but brown in alkaline medium.
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No.7004571561149742****
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