In present work,the volatile constituents of Curcuma longa L.,A.lancea (Thunb.) DC.,Foeniculum vulgare Mill,and Cinnamomun cassia Presl.have been analyzed by flash distillation/capillary gas chro-matography/mass spect...In present work,the volatile constituents of Curcuma longa L.,A.lancea (Thunb.) DC.,Foeniculum vulgare Mill,and Cinnamomun cassia Presl.have been analyzed by flash distillation/capillary gas chro-matography/mass spectrometry.The results are consistent with those obtained by conventional steam distillation extraction method.The optimum condition of flash distillation has been studied.The experimental results showed that this new technique proved to be a simple,rapid and efficient tool for microanalysis of volatile constituents of Chinese medicinal herbs.展开更多
One-dimensional liquid chromatography(1D-LC)is routinely applied to the analysis of all kinds of samples in different fields.With the introduction of UHPLC instruments and sub-2micron particle columns,the separation e...One-dimensional liquid chromatography(1D-LC)is routinely applied to the analysis of all kinds of samples in different fields.With the introduction of UHPLC instruments and sub-2micron particle columns,the separation efficiency was greatly improved.To resolve all components of complex samples,however,1D-LC does not provide enough resolving power,or peak capacity.In addition,to separate compounds co-eluting in 1D-LC,increasing the separation efficiency by increasing展开更多
文摘In present work,the volatile constituents of Curcuma longa L.,A.lancea (Thunb.) DC.,Foeniculum vulgare Mill,and Cinnamomun cassia Presl.have been analyzed by flash distillation/capillary gas chro-matography/mass spectrometry.The results are consistent with those obtained by conventional steam distillation extraction method.The optimum condition of flash distillation has been studied.The experimental results showed that this new technique proved to be a simple,rapid and efficient tool for microanalysis of volatile constituents of Chinese medicinal herbs.
文摘One-dimensional liquid chromatography(1D-LC)is routinely applied to the analysis of all kinds of samples in different fields.With the introduction of UHPLC instruments and sub-2micron particle columns,the separation efficiency was greatly improved.To resolve all components of complex samples,however,1D-LC does not provide enough resolving power,or peak capacity.In addition,to separate compounds co-eluting in 1D-LC,increasing the separation efficiency by increasing
