A new method was developed for the analysis of the volatile and semi-volatile acidic components in tobacco by gas chromatography-mass spectrometry selected ion monitoring(GC-MS,SIM)method.The acidic components in toba...A new method was developed for the analysis of the volatile and semi-volatile acidic components in tobacco by gas chromatography-mass spectrometry selected ion monitoring(GC-MS,SIM)method.The acidic components in tobacco samples were extracted by methylene chloride using simultaneous distillation and extraction equipment,and they were analyzed by HP-INNOWAX column(30m×250μm×0.25μm).Thirteen acidic components were quantitatively determined by internal standard curve method.The experiment results showed that the added standard recoveries of the acidic components were in the range from 80.6% to 98.8%,the relative standard deviations(RSD)were less than 2.0% and the correlation coefficients were more than 0.99.The method is simple,rapid and accurate for the determination of the volatile and semi-volatile acidic components in tobacco.展开更多
The extracts of Ganoderma lucidum capsule powder (A) and natural ganoaerma lucidum (B) have been and analyzed by gas chromatography-time of flight mass spectrometry (GC-TOFMS). A great quantity of aliphatic acid (este...The extracts of Ganoderma lucidum capsule powder (A) and natural ganoaerma lucidum (B) have been and analyzed by gas chromatography-time of flight mass spectrometry (GC-TOFMS). A great quantity of aliphatic acid (ester)Was observed at tR= 18min and tR = 20min, including the unsaturated aliphatic acid which is valuable. The relative content of aliphatic acid in sample A was 49.6%, of which 19.4% was linoleic acid, and those in sample B was 32.6%, of which 7.0% was linoleic acid. The relative content of aliphatic acids in sample A was higher than that in sample B.展开更多
文摘A new method was developed for the analysis of the volatile and semi-volatile acidic components in tobacco by gas chromatography-mass spectrometry selected ion monitoring(GC-MS,SIM)method.The acidic components in tobacco samples were extracted by methylene chloride using simultaneous distillation and extraction equipment,and they were analyzed by HP-INNOWAX column(30m×250μm×0.25μm).Thirteen acidic components were quantitatively determined by internal standard curve method.The experiment results showed that the added standard recoveries of the acidic components were in the range from 80.6% to 98.8%,the relative standard deviations(RSD)were less than 2.0% and the correlation coefficients were more than 0.99.The method is simple,rapid and accurate for the determination of the volatile and semi-volatile acidic components in tobacco.
文摘The extracts of Ganoderma lucidum capsule powder (A) and natural ganoaerma lucidum (B) have been and analyzed by gas chromatography-time of flight mass spectrometry (GC-TOFMS). A great quantity of aliphatic acid (ester)Was observed at tR= 18min and tR = 20min, including the unsaturated aliphatic acid which is valuable. The relative content of aliphatic acid in sample A was 49.6%, of which 19.4% was linoleic acid, and those in sample B was 32.6%, of which 7.0% was linoleic acid. The relative content of aliphatic acids in sample A was higher than that in sample B.
