Ultrasonic-assisted extraction and composition analysis by Gas Chromatography-Mass Spectrometry of volatile oil from Chuanminshen violaceum

To study the extraction and analysis of chemical constituents in volatile oil from Chuanminshen violaceum, the volatile oil of from Chuanminshen violaceum was extracted by ultrasonic-assisted extraction method and its chemical composition was analyzed by GC-MS. On the basis of single factor experiments, a polynomial regression model was fitted by means of Box-Behnken design. The optimum extraction conditions were as follows:liquid to solid ratio 8∶1 (m L/g) , ultrasonic power 175 W, and ultrasonic time 28 min. Under the conditions, the extraction yield of volatile oil reached 2.213%±0.042%. A total of 76 compounds were detected in the volatile oil, of which 42 were identified, accounting for 97.37% of the total volatile compounds. This study could provide useful references for the development and exploitation of Chuanminshen violaceum.