Method: Sample solution were extracted by ultrasonic in different power and frequency and by reflux.

方法：用不同功率和频率的超声仪提取及加热回流提取样品液。

youdao

Method: Sample solution were extracted by ultrasonic in different power and frequency and by reflux.

方法：用不同功率和频率的超声仪提取及加热回流提取样品液。

youdao