Studies on preparations and analysis of essential oil from Chinese fir

Abstract

Three steam distillation devices (D-1, D-2 and D-4) or one simultaneous distillation (D-3, water-diethyl ether) as well as the process of CO₂-SFE (Supercritical fluid extraction) were adopted in extraction of essential oils from Chinese-fir (Cunninghamia lancedata (Lamb) Hook.) and the chemical components of the extracted essential oil were analyzed by Gas chromatograph-MS analyses. The results showed that the essential oil could be almost extracted out within 2 hours and the device-3 had the highest extraction efficiency. The major chemical component of the oil was cedrol. The yield of the extracted essential oils from Chinese fir decreased gradually with the increase of the distillation time. The best condition for extraction by means of CO₂-SFE is 100 kg·cm⁻² in pressure and 40°C in temperature for.

Keywords

Chinese fir / Essential oil / Cedrol / Supercritical fluid extraction / S781.4 / A

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