(College of Chemistry and Molecular Engineniry,Peking University,Beijing,100871)
Abstract:
According to the traditional Chinese medicine,it was reported that the volatiles of the ox feces
are effective in curing many illness.We collected the volatiles of ox feces by using a
simultaneous distillation and extraction (SDE) equipment.The chemical composition of the
enriched volatiles was examined by means of capillary gas chromatography and combined
gas chromatography-mass spectrometry.50 constituents of the volatiles were preliminarily
identified by GC-MS,which amounted to 70.92% of the total peak areas.Of these
compounds,24 were further verified by measuring their temperature-programmed retention
indexes or retention times on SE-54 and PEG-20M columns and making comparison with
those of the corresponding authentic samples,which amounted to 34.68% of the total peak
areas.Another 8 constituents of the volatiles were verified by making comparison with the
data in The Sadtler Standard Gas Chromatography Retention Index Library,which amounted
to 6.09% of the total peak areas. The main constituents of the volatiles are hexanal (6.20%),
dimethyl trisulfide (5.48%), dimethyl disulfide (4.55%), nonanal (4.35%), dimethyl
tetrasulphide (3.96%), octanal (3.61%), heptanal (3.22%). The compound classes consist of
aldehydes (14), alcohols (3), ketones (12) and acids (2).
Key words:
gas chromatography-mass spectrometry;ox feces;volatiles;temperature-programmed
retention indexes
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