葡萄皮色素提取工艺的研究

目的]为葡萄皮色素的开发提供有价值的试验数据。方法]以葡萄皮为原料,通过单因素试验及正交试验优化葡萄皮色素的提取工艺。结果]乙醇浓度为50%～90%时,葡萄皮色素的提取效果呈上升趋势。提取温度50～80℃、料液比由14:增加到15:时,葡萄皮色素的吸光度增加明显。提取时间为2 h时,葡萄皮色素的吸光度值最大。各因素对葡萄皮色素提取效果的影响主次顺序为:提取溶剂浓度>料液比>提取温度,最优提取工艺为提取溶剂80%乙醇,料液比17:,提取温度80℃,提取时间2 h。结论]该提取工艺以乙醇为提取溶剂,成本低廉,且操作简单,安全性高,适于工业化生产。

Study on Extraction Technology for Pigment from Grape Peel

Objective] The aim was to provide valuable experiment data for the development of grape peel pigment.Method] With the grape peel as raw material,the extraction technology for pigment from grape peel was optimized through the single factor test and orthogonal test.Results] The extraction effect on the grape peel pigment showed a rising trend when the ethanol concn.was 50%-90%.The absorbance of grape peel pigment was increased evidently when the extraction temperature was 50-80 ℃,and solid-liquid ratio was increased from 1:4 to 1:5.The absorbance value of grape peel pigment was the largest when the extraction time was 2 h.The influence of different factors for the extraction effect on grape peel pigment in order was: extraction solvent concn.> solid-liquid ratio > extraction temperature.The best extraction technology was extracted solution of 80% ethanol,the solid-liquid ratio of 1:7,extracting temperature of 80 ℃,and the extracting time of 2 h.Conclusion] This extraction technology,taking the ethanol as the extraction solvent,had features of with low cost,easy operation and high safety,and was suitable for industrialized production.