Volatile metabolomics of Schisandra chinensis before and after the storage
Objective To clarify the difference of volatile components between newly produced and stored Schisandra chinensis.Methods Head space-solid phase microextraction-gas chromatography-mass spectrometry(HS-SPME-GC-MS)was used to determine the volatile components in newly produced and stored Schisandra chinensis from three origins,and the volatile components were identified by matching the mass spectra with the standard spectra database.The differential metabolites between newly produced and stored Schisandra chinensis were screened by hierarchical cluster analysis(HCA),principal component analysis(PCA)and orthogonal partial least squares discriminant analysis(OPLS-DA).Results Totally 165 volatile components were detected in Schisandra chinensis,and 81 volatile components were identified,including sesquiterpenoids,monoterpenoids,aliphatic hydrocarbons,aromatic ethers,aliphatic ketones,fatty acids,esters,aliphatic aldehydes and aromatic aldehydes.Totally 22 differential metabolites between newly produced and stored Schisandra chinensis were screened out.The structure of 18 differential metabolites,including 13 monoterpenoids,1 aliphatic aldehyde,1 alkane,1 fatty acid,1 aromatic aldehyde and 1 aromatic ether,were identified.While 18 out of the 22 differential metabolites had a high content in newly produced Schisandra chinensis,the other 4 differential metabolites(acetic acid,3-furfural,nonanal and dodecane),had a high content in stored Schisandra chinensis.Newly produced and stored Schisandra chinensis were differentiated through the 22 metabolites.Conclusion The volatile components of Schisandra chinensis are clarified the changes in volatile components after the storage,providing useful information for the quality evaluation and active ingredient research of Schisandra chinensis.
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