1-L-丙氨酸-1-脱氧-D-果糖的热裂解分析

摘要

The thermal decomposition of 1 -L-Alanine-1 -deoxy-D-fructose ( Ala-Fru ) was investigated by Thermogravimetry-Differential Thermal Analysis (TG-DTA) and online pyrolysis gas chromatography-mass spectroscopy( Py-GC/MS). The analysis results of TG-DTA showed that the primary pyrolysis temperature of Ala-Fru was 147.47℃ ,and the residual mass was 25% of the original weight in 600 ℃. The pyrolysis results of Ala-Fru at 350 ℃ ,450 ℃ ,550℃,650 ℃ ,750 ℃ and 850 ℃ by on line Py-GC/MS showed that different pyrolytic compounds were obtained at different temperatures, the number of pyrolytic pruducts increased with temperature. The major of pyrolytic compounds was heterocycle including pyrazine, pyridine, pyrrole, furan etc and ketones, which were the important components of producing flavor and aroma in cigarette smoke.%采用热重/差热( TG-DTA)和在线裂解气相色谱/质谱联用(Py-GC/MS)分析技术对1-L-丙氨酸-1-脱氧-D-果糖(Ala-Fru)的热裂解进行了研究.TG-DTA分析结果显示,Ala-Fru的初始裂解温度为147.47℃,600℃时样品质量损失至原重的25％；在350℃,450℃,550℃,650℃,750℃和850℃这6个温度下的Py-GC/MS结果显示,裂解产物的种类和数量随裂解温度的升高而增多,其裂解产物主要为吡嗪类、吡啶类、吡咯类和呋喃类等杂环类化合物以及少量酮类化合物,这些物质是卷烟烟气中重要的香味成分.