以酯类物质的含量为评价指标,对超高压处理干红枣酒成熟的工艺条件进行研究,并利用GC/MS法对干红枣酒中的挥发性成分进行分析,结果表明:超高压处理的最佳工艺条件为处理压力400 MPa,处理温度55℃,保压时间25 m in.该处理方式下的干红枣...以酯类物质的含量为评价指标,对超高压处理干红枣酒成熟的工艺条件进行研究,并利用GC/MS法对干红枣酒中的挥发性成分进行分析,结果表明:超高压处理的最佳工艺条件为处理压力400 MPa,处理温度55℃,保压时间25 m in.该处理方式下的干红枣酒中的酯类物质含量高于自然成熟180 d的样品4.71%.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
文摘以酯类物质的含量为评价指标,对超高压处理干红枣酒成熟的工艺条件进行研究,并利用GC/MS法对干红枣酒中的挥发性成分进行分析,结果表明:超高压处理的最佳工艺条件为处理压力400 MPa,处理温度55℃,保压时间25 m in.该处理方式下的干红枣酒中的酯类物质含量高于自然成熟180 d的样品4.71%.
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.
