利用微波技术提取葡萄籽粕中原花青素的研究

Study on extraction technology of grape seed procyanidins from rapeseed meal by microwave method

通过试验室专用微波装置对葡萄籽粕中原花青素提取工艺进行了研究,探讨了溶剂种类、提取浓度、提取时间、提取料液比、提取温度对提取率的影响,并对以上因素通过响应面分析,探索最佳提取工艺。结果表明:以70%乙醇为提取剂,料液比为1∶7.5,并加0.5%柠檬酸辅助提取,微波提取温度约55℃,2次提取总时间90min,原花青素含量为7.06%,提取率(69.54±3.46)%,优于传统水浴加热提取方式。

Extraction technology of grape seed procyanidins from rapeseed meal by microwave method were studied in this article. The effect of solvent type, solvent concentration, extraction time, extraction of the solid-liquid ratio, extraction temperature on rate of extraction of procyani- dins and the best extraction process by response surface analysis were explored. The results show that： 70% ethanol as extraction solvent, solid-liquid ratio of 1 ： 7. 5, plus 0. 1% citric acid assis- ted extraction, microwave extraction temperature of about 55℃, the extract total time 90 rain, procyanidin content of 7. 06%, the extraction rate （69. 54 -＋ 3.46） %, better than the traditional water bath heating extrnetion method.