摘要
采用热重-差热法对1-L-亮氨酸-1-脱氧-D-果糖(Ⅰ)和1-L-异亮氨酸-1-脱氧-D-果糖(Ⅱ)的热失重和热裂解温度进行了研究,通过在线裂解GC-MS联用技术分别对(Ⅰ)和(Ⅱ)在350℃、450℃、550℃、650℃、750℃和850℃条件下的裂解产物进行了鉴定。研究结果表明2种Amadori化合物的的热失重曲线相似,(Ⅰ)的裂解温度为144.67℃,(Ⅱ)的裂解温度为164.26℃,600℃时(Ⅰ)和(Ⅱ)失重约80%;二者裂解产物主要为吡嗪类、吡啶类、吡咯类、喹啉类和呋喃类等杂环化合物,芳香族化合物以及醛类和酮类,其中以吡嗪类为主;裂解产物的数量随着裂解温度的升高而增多,(Ⅰ)的裂解产物数量与(Ⅱ)的裂解产物数量相当。对(Ⅰ)和(Ⅱ)的主要裂解产物形成途径进行了初步探讨,可为研究其在卷烟燃烧过程中的转化行为提供参考。
Thermal decomposition and pyrolysis temperatures of 1-L-Leucine-1-deoxy-D-fructose（Ⅰ） and 1-L-Isoleucine-1-deoxy-D-fructose（Ⅱ） were investigated by Thermogravimetry-Differential Thermal Analysis（TG-DTA）.Pyrolysis behavior of（Ⅰ） and（Ⅱ） were performed by an on-line pyrolysis gas chromatography/mass spectrometry（Py-GC-MS） at the temperature of 350°C,450°C,550°C,650°C,750°C and 850°C respectively.Results showed that the TG curve of（Ⅰ） was similar to that of（Ⅱ）,and the pyrolysis temperatures of（Ⅰ） and（Ⅱ） were 144.67℃ and 164.26℃ respectively.The major pyrolysis compounds of（Ⅰ） and（Ⅱ） were heterocyclic compounds,including pyrazines,pyridines,pyrroles,quinolines and furans,aromatic compounds,aldehydes and ketones.Pyrazines were main pyrolysis products among heterocyclic compounds.The quantity of pyrolysis products of（Ⅰ） and（Ⅱ） increased with temperature rising gradually and almost the same to each other.The formation of major pyrolysis products of（Ⅰ） and（Ⅱ） was preliminarily discussed which may provide important theoretical basis for determining the role of flvour in cigarettes evaluation.
出处
《中国烟草学报》
EI
CAS
CSCD
2010年第6期1-9,共9页
Acta Tabacaria Sinica
