Objective: To clarify chemical dynamic change of volatile oil of Root of Changium Smyrnioides Wolff during Processing, to analyse and study the change of constituent proportion to see if new constituents produce or original constituents disappear, to discuss the processing mechanism of root of Changium smyrnioides . Method: The constituents and contain of volatile oils of root of Changium smyrnioides before, during and after processing are comparatively analyzed by using techniques of combined capillary gas chromatography mass spectrometry computer. Result: 34 chemical compounds are identified, among them there were 29 compounds isolated from volatile oil of fresh root of Changium smyrnioides, with a proportion of 97.873% in total oil, its main constituent is CSY and its content reaches 70.946%; 34 compounds were isolated from volatile oil of fresh decorticated root of Changium smyrnioides, with a propoction of 93.452%, main constituent is CSY, its content reaches 75.909%; and 19 compounds from volatile oil of fresh root cortices of Changium smyrnioides, 96.878% , main constituent is CSY, content 70.977%; 11 compounds from volatile oil of processed root of Changium smyrnioides, 88.839%, main constituent is CSY, content 67.234%. Conclusion: Main reasons of non sensibilization of processed root of Changium smyrnioides are considered to be the content decrease and qualitative change of the volatile oils, and the content of snsibilization activity constituent——CSY decreased from 0.0497% to 0.0134%.

Objective To observe the influence of storage time and condition on the chemical components in the volatile oil of Fructus Evodia by GC-MS.Methods The volatile oil was extracted from Fructus Evodia by steam distillation and the amount of each components in the volatile oil was determined by area normalization method and the components were identified by GC-MS.Results One hundred and sixteen components were separated and identified,which accounted for more than 90% in the total constitutes of the volatile oil.The content of volatile oil in Fructus Evodia was influenced by the storage time and condition.Conclusions The method is reliable and has a good repeatability,and can be applied to analyze volatile components in Fructus Evodia.This will provide a certain scientific basis for the storage and clinical application of Fructus Evodia.

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