The volatile and semi-volatile components in flower of Elaeagnus angustifolia were extracted by using simultaneous distillation-extraction and extraction respectively from steam and water residue, and the chemical com...The volatile and semi-volatile components in flower of Elaeagnus angustifolia were extracted by using simultaneous distillation-extraction and extraction respectively from steam and water residue, and the chemical compositions were determined by GC-MS. The results indicated that the components from water residue were different from those obtained from simultaneous distillation-extraction, which were similar to the literature results. The components in water residue contained benzoic acid(6.94%), benzeneacetic acid(5.49%), salicylic acid(1.21%),cis-cinnamic acid(5.35%), trans-cinnamic acid(20.37%), cis-p-hydroxycinnamic acid(3.96%), trans-p-hydroxylcinnamic acid(1.77%), 3-(3-hydroxyphenyl)-2-propenoic acid(1.66%), cis-3-(4-hydroxy-3-methoxyphenyl)-2-propen-oic acid(1.19%), 4-hydroxy-3-methoxybenzoic acid(6.77%), 4-hydroxybenzoic acid(2.43%), alpha-(phenylmethyl)-benzeneethanol(4.46%), 3,5-dimethoxy-4-hydroxyphenylacetic acid(1.7%), 2,6-dimethyl-1,7-octadiene-3-ol(5.29%), (Z,Z)-9,12-octadecadienoic acid(1.66%), et al. The analysis results showed that flower of Elaeagnus angustifolia is importance plant resource to extract nature perfume, antimicrobial and antioxidant.展开更多
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
文摘The volatile and semi-volatile components in flower of Elaeagnus angustifolia were extracted by using simultaneous distillation-extraction and extraction respectively from steam and water residue, and the chemical compositions were determined by GC-MS. The results indicated that the components from water residue were different from those obtained from simultaneous distillation-extraction, which were similar to the literature results. The components in water residue contained benzoic acid(6.94%), benzeneacetic acid(5.49%), salicylic acid(1.21%),cis-cinnamic acid(5.35%), trans-cinnamic acid(20.37%), cis-p-hydroxycinnamic acid(3.96%), trans-p-hydroxylcinnamic acid(1.77%), 3-(3-hydroxyphenyl)-2-propenoic acid(1.66%), cis-3-(4-hydroxy-3-methoxyphenyl)-2-propen-oic acid(1.19%), 4-hydroxy-3-methoxybenzoic acid(6.77%), 4-hydroxybenzoic acid(2.43%), alpha-(phenylmethyl)-benzeneethanol(4.46%), 3,5-dimethoxy-4-hydroxyphenylacetic acid(1.7%), 2,6-dimethyl-1,7-octadiene-3-ol(5.29%), (Z,Z)-9,12-octadecadienoic acid(1.66%), et al. The analysis results showed that flower of Elaeagnus angustifolia is importance plant resource to extract nature perfume, antimicrobial and antioxidant.
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.
