超声辅助提取火龙果果皮色素的研究

Study on Ultrasonic- Assisted Extraction of Pigment from Pitaya Peel

利用超声辅助萃取技术提取火龙果果皮色素。通过单因素实验和正交实验对料液比、超声功率、超声时间和提取温度等因素进行探讨,以建立火龙果果皮色素的提取工艺。结果显示,影响火龙果果皮色素提取因素的主次顺序为料液比>超声时间>提取温度>超声频率。最优提取条件为料液比1∶30(g/m L),超声时间25 min,超声提频率80Hz,提取温度40℃。与浸提法相比,超声辅助提取用时更短,提取效率更高。

In this study,red pigment from pitaya fruit peel was extracted by ultrasonic -assisted ex-tracting.To determine the optimal extraction conditions,the effect of the conditions,such as the solid -liq-uid ratio,the ultrasonic frequency,the ultrasonic time and the extraction temperature were studied by the single factor experiment and the orthogonal test.The results showed that the order of factor to affect red pig-ment extraction was solid -liquid ratio ＆gt; ultrasonic time ＆gt; extraction temperature ＆gt;ultrasonic frequency. The optimum extracting conditions were as follows：the solid to solution ratio was 1∶40,the ultrasonic time was 25min,the ultrasonic frequency was 80Hz and the extraction temperature was 40℃.Compared with tra-ditional extraction,it saves time and increases efficiency.