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KMID : 0615720110280020089
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Jouranl of Korean Acupuncture and Moxibustion society
2011 Volume.28 No. 2 p.89 ~ p.95
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The Study on the Composition of Rehmanniae Radix Extracts by Supercritical Carbon Dioxide Extraction and by Hydrodistillation Extraction
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Heo Jong-Won
Yook Tae-Han
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Abstract
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Objectives : The purpose of this study was to investigate the composition of Rehmannia glutinosa’s essential oils with Rehmanniae Radix herbal acupuncture
Methods : I obtained the essential oils of Rehmannia Radix by hydrodistillation extraction method and supercritical fluid extraction(SFE) method, and then I analyzed those by GC/MS(gas chromatography/mass spectrum).
Results : 1. With GC(gas chromatography) and GC/MS(gas chromatography/mass spectrum) analysis. I identified 9 compounds in the Rehmanniae Radix’s essential oil obtained through the SFE method. The main compounds were as follows : Hexachloroethane(2.24%), N-Butyl-benzenesulfonamide(2.05%), hexadecanoic acid(1.93%), hexadecanoic acid, ethyl ester(3.49%), 9,12-Octadecadienoic acid(z,z)(2.70%), (9E)-9-Octadecenoic acid(6.14%), ethyl linoleate(4.43%), ethyl oleate(5.80%). 2. I failed to get Rehmanniae Radix’s essential oil obtained through the hydrodistillation method. 3. With GC(gas chromatography) and GC/MS(gas chromatography/mass spectrum) analysis. I identified 4 compounds in the Rehmanniae Radix’s essential oil obtained through the hydrodistillation method. The main compounds were as follows : Ethylbis(trimethylsilyl)amine(1.04%), 2-(Trimethylsiloxy)benzoic methyl ester(2.65%), Hexadecanoic acid trimethylsilyl ester(12.61%), octadecanoic acid, trimethylsilyl ester(6.28%).
Conclusions : The substances by hydrodistillation method may not perfectly match with the substances by supercritical fluid extraction(SFE) method in essential oils extracted form Rehmanniae Radix. But, the main substances was assumed Hexadecanoic acid and octadecanoic acid.
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KEYWORD
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supercritical fluid extraction, Rehmannia glutinosa, 지황, 地黃, Rehmanniae Radix, herbal acupuncture, hydrodistillation, GC/MS, gas chromatography/mass spectrum
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