连翘花黄色素超声波提取及其稳定性探究

Study on Extraction and Stability of Yellow Pigment in Weeping Forsythia Flowers

采用乙醇为提取溶剂,通过超声波提取连翘花天然黄色素。采取正交试验法优化提取工艺,并对黄色素进行了稳定性试验。实验表明:乙醇浓度75%、超声时间30min、超声温度60℃、超声功率为85%、固液比1∶40时,黄色素的提取率最高。连翘花黄色素在弱酸、中性及稀碱性条件下均能稳定存在,而强氧化剂会影响其稳定性。

By using ethanol as solvent and ultrasonic wave extract the natural yellow pigment from Weeping Forsythia flowers,orthogonal test was adopted to optimize ultrasonic extraction process,and the stability of yellow pigment was tested.The experimental results show that the ethanol concentration is75%,the time of ultrasonic extraction is30min,the temperature of ultrasonic extraction is60degrees Celsius,the power of ultrasonic extraction is85%,and the extraction rate of yellow pigment is the highest when the solid liquid ratio1:40.The pigment obtained in the experiment of yellow pigment from Weeping Forsythia flowers is stable in weak acidic,neutral and alkaline conditions,but the strong oxidant influence its stability.