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[Essential oil composition of three herbal medicines from Curcuma wenyujin by GC-MS]
Qingzhe Zhang1, Fang Yang, Jingjing Zhu
1Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
Objective:
To compare the contents and composition of volatile oil of Wenyujin (steamed root of Curcuma wenyujin) Wenezhu (steamed rhieome of Curcuma wenyujin) and Pianjianghuang (rhizome of Curcuma wenyujin).
Method:
The volatile oils of three herbal medicines obtained by steam distillation were determined according to the method described in the appendix XD in Chinese pharmacopoeia and identified by GC-MS.
Result:
The average contents of volatile oil of Wenyujin, Wenezhu and Pianjianghuang were 0.56, 1.99 and 0.94 microL x g(-1), respectively. A total of 60 compounds were identified by GC-MS. The amounts of chemical components separated and identified in Wenyujin, Wenezhu and Pianjianghuang were 41, 41 and 40, respectively. Three medicines share a great deal of similarity, chemically and genetically. Low boiling point essential oil compositions Wenyujin and Wenezhu were similar. While the higher boiling point essential oil compositions of Wenyujin and Wenezhu were similar. And the essential oil compositions of Wenyujin and Pianjianghuang were distinct.
Conclusion:
Although coming from the same origin, the composition of essential oil from different part of the plant or various process were discrepant, which lead to rather distinct clinical efficacy.
