花椒油树脂的低强度多频超声浸取特性研究

Study on the Effects on Extracting Zanthoxylum piasezkii Maximl Oleoresin by Low Intensity and Several Frequencies Ultrasound

以乙醇为溶剂,进行了低强度(不超过1.2W/cm2)单频、双频复合和三频复合超声浸取花椒油树脂的研究,获得花椒油树脂在不同频率条件低强度超声场中的浸取特性。利用DPS系统建立包括温度、固液比、时间、粒度、功率强度和频率(20、50和135kHz)等因素的均匀设计实验方案,以浸取液折光率和油树脂得率为指标,利用偏最小二乘法处理实验数据,以标准化回归系数评价各因素的影响强度。研究表明,三频超声浸取的浸取液折光率最高,为1.3726;双频超声浸取的花椒油树脂得率最高,为30.1%。在单频超声浸取中,单因素起决定作用;双频复合超声浸取和三频复合超声浸取可以弱化温度因素的影响,而且双因素的共同作用更突出;双频复合超声的能量效率比单频超声和三频复合超声高。

Extracting Zanthoxylum piasezkii Maximl with ethanol by single-frequency ultrasound（SFU） ,dualfrequency-complex ultrasound（DCU） and tri-frequency-complex ultrasound （TCU） at low ultrasonic intensities（ up to 1.2W·cm^-2） were studied. In order to find out the characteristics of extraction the oleoresin, and make the experimental plan of various experimental conditions, such as temperature, solid and liquid rate, time, granularity, intensity and frequency（20kHz,50kHz and135kHz）, the uniform design was done by DPS, and the test data was processed with PLS procedure for the irrefrangibility and the oleoresin yield, then the effect of the factors was confirmed by the standard regression coefficient. The result shows that the highest value of the irrefrangibility and the oleoresin yield is D20nl. 3726 in DCU and 30.1% in TCU respectively. In addition, the single-factor plays an important part in SFU. Temperature influence is weakened in DCU and TCU, and dual-factor effect is stronger, the energy efficiency in DCU is higher than in SFU and TCU.