【摘要】 研究了葡萄皮不同提取物的抗氧化活性,并探索其抗氧化物质的组成和稳定性。结果表明:以50%的乙醇水溶液为溶剂,料液比1:30、温度60℃、浸提时间40 min时,提取物抗氧化效果较好;利用紫外吸收光谱和物质显色反应进行定性分析,可以断定提取物中主要含酚酸类和二氢黄酮类化合物;葡萄皮提取液在光照一定时间、一定温度范围、酸性条件下和NaCl溶液中是稳定的,但在碱性条件下有不稳定现象出现。更多还原

【Abstract】 The anti-oxidation activity of grape skin extractives was studied,as well as their effectual ingredient and stability.The results showed the best extraction conditions:using 50% alcohol as solvent,ratio of solid to liquid as 1:30,at temperature 60℃,extracting time 40 min;Using the UV absorption spectrum and the colour experiment to do the qualitative analysis,the extractives mostly contain phenolic and dihyo-flavonoid;The grape skin extractives was steady when it was in sometime of illumination,a scope of temperature,the acid condition and NaCl solution,but there were unstable phenomena under the alkaline condition.更多还原