[Analyze on chemical compositions of Dalbergia odorifera essential oils extracted by CO2-supercritical-fluid-extraction and steam distillation extraction].

OBJECTIVE: To analyze the chemical compositions of Dalbergia odorifera essential oils extacted by CO2-supercritical-fluid-extraction (SFE-CO2) and steam distillation extraction (SD). METHODS: The essential oils of Dalbergia odorifera were extracted by steam distillation extraction and SFE-CO2. The chemical components were separated and analyzed by gas chromatography-mass spectrometry. RESULTS: 12 compounds were identified in SFE sample. The major components from essential oils were 2-propenoic acid-3(4-methoxyphenyl)-ethyl ester (14.53%), nerolidol (14.95%), ageratochromene (1.33%). 9 compounds were identified in SD sample. The major components from essential oils were nerolidol (26.61%), cedrol (1.65%). CONCLUSION: The SFE method is better than the SD method in reliability stability and reproducibility, and suitable for essential oils extraction of Dalbergia odorifera.