荔枝核中原花青素超声波提取工艺研究

[目的]优化超声波细胞粉碎机提取荔枝核中（SEMEN LITCHI）原花青素的工艺条件。[方法]以荔枝核为原料,考察提取溶剂、乙醇体积分数、pH值、料液比、超声波功率、提取时间、提取次数及荔枝核粉末粒径对原花青素得率的影响;在此基础上,用正交试验优化超声波提取荔枝核中原花青素的最佳工艺条件。[结果]采用超声波提取荔枝核中原花青素的最佳工艺条件为：粉末粒径100目,料液比1∶8（W/V）,乙醇体积分数70%,pH值5.0,超声波功率600 W,提取时间30 m in,提取1次。各因素影响原花青素提取效果的主次顺序是：提取时间〉粉末粒径〉料液比〉超声波功率。采用最佳试验组合提取荔枝核中原花青素,得率为13.11%。[结论]该研究可为荔枝核中原花青素和食品色素的有效利用提供借鉴。

Ultrasonic Extraction of Proanthocyanidins from SEMEN LITCHI

[Objective] To optimize the extraction process of proanthocyanidins from SEMEN LITCHI with ultrasonic cell disruptor.[Method] Litchi chinensis Sonn.as tested material,effects of extractant,volumetric fraction,pH value,solid-liquid ratio,ultrasonic power,extracting duration,extraction times and the partical size of SEMEN LITCHI on the yield rate of proanthocyanidins were investigated in this study,and the optimum extraction process of proanthocyanidins was obtained through orthogonal test.[Result] The optimum extraction process of proanthocyanidins was as follows: 100 mesh of SEMEN LITCHI powder,solid-liquid ratio of 1∶8,ethanol fraction of 70%,pH of 5.0,ultrasonic powder of 600 W,extraction duration of 30 min for one time,and the influence factors were in the order as: extraction duration>partical size>solid-liquid ratio>ultrasonic power.[Conclusion] The optimum extraction process of proanthocyanidins from SEMEN LITCHI was obtained in this study,and the yield rate was 13.11%,which would provide reference for the effective utilization of proanthocyanidins and food colors from SEMEN LITCHI.