毛葡萄皮渣花色苷的真空辅助提取工艺优化

为充分利用“野酿2号”毛葡萄汁生产副产物——皮渣中的花色苷成分，该研究利用60 L真空提取和浓缩装置对毛葡萄皮渣花色苷进行提取、浓缩，以花色苷含量为评价指标，通过单因素试验和正交试验对其提取工艺进行优化，并对其浓缩效果进行比对。结果表明，毛葡萄皮渣花色苷的最佳真空辅助提取条件为：料液比1∶6(V/V)，乙醇体积分数65%,pH值为1.0，油浴温度65℃，真空度0.08 MPa，提取时间120 min。在此优化条件下，花色苷的提取得率、浓缩得率分别为1.59%、1.42%，浓缩时间为5.12 h，浓缩损失率为10.92%。该研究为毛葡萄皮渣花色苷的工业化生产提取和浓缩提供了一定的技术参考。

Optimization of vacuum-assisted extraction process of anthocyanin from Vitis quinquangularis Rehd pomace

In order to make full use of the anthocyanin in pomace, a by-product from the grape juice production of Vitis quinquangularis Rehd "Yeniang No.2", the anthocyanin in V. quinquangularis Rehd pomace was extracted by 60 L vacuum extraction and concentrated by concentration device. Using the anthocyanin content as evaluation index, extraction process was optimized by single factor test and orthogonal test, and the concentration effect was compared. The results showed that the optimal extraction conditions of anthocyanin in V. quinquangularis Rehd pomace were as follows: solid-　liquid ratio 1∶6 (V/V), alcohol volume fraction 65%, pH 1.0, oil bath temperature 65 ℃, vacuum degree 0.08 MPa, and extraction time 120 min. Under the optimal conditions, the extraction rate and concentration rate of anthocyanin were 1.59% and 1.42%, respectively, concentration time was 5.12 h, and concentration loss rate was 10.92%. This study provided a certain technical reference for industrial production of extraction and concentration of anthocyanin from V. quinnquangularis Rehd pomace.