Supercritical CO₂ Extraction of Essential Oil from Dracocephalum tanguticum Max‐im and Analysis by GC‐MS

Abstract

The feasibility of active components of Dracocephalum tanguticum Max‐im (DtM) extracted by supercritical CO₂ was discussed in this paper. The components of the essential oil from the DtM were analyzed by GC‐MS. The optimal conditions of supercritical CO₂ extraction: pressure 20 MPa, extraction temperature 50°C, extraction time 75 min, CO₂ flow 1.0 L · min⁻¹ were obtained. Seventy‐six components from DtM were separated and identified by supercritical CO₂ extraction. There is an abundance of unsaturated fatty acid, saturated fatty acid, acid, alkane, and ester in the essential oil extracted from the DtM. The study established a good method for further studying medical applications and develoment of the DtM.

Keywords:

• Dracocephalum tanguticum Max‐im
• Essential oil
• Supercritical fluid extraction
• GC‐MS