The thermogravimetry and pyrolysis behavior of cigarettes were investigated by thermo-gravimetric analysis coupled with Fourier transform infrared spectroscopy (TG-FTIR) and pyrolysis-gas chromatrography/mass spectrometry (Py-GC/MS). The curves of TG and derivative thermogravimetry (DTG) of cigarettes were determined, and the releasing amounts of H2 O, CO2, CO,NH3 and CH4 produced by pyrolysis under different atmospheres were also compared. The results showed that the atmosphere had an obvious effect on the pyrolysis of cigarettes. The thermal decomposition of cigarettes were mainly taken place between 200 -500℃ and became slowly after 700℃ under nitrogen and air atmosphere. The solid residue in nitrogen at final was about 25％,while in air was approximately 7 -9％. The qualitative and semi-quantitative analyses of the pyrolysis products of cigarettes were performed by Py-GC/MS at 600,700, 800,900, iO00℃ respectively. The effects of pyrolysis temperature and atmosphere on the pyrolysis behavior for the selected pyrolysates in smoke were discussed.%应用热重红外联用技术(TG-FTIR)和热裂解气相色谱-质谱联用技术(Py-GC/MS)对卷烟烟丝的热失重和热裂解行为及其裂解产物进行研究.采用热重分析法测定不同气氛下卷烟样品的热失重(TG)、微商热重(DTG)曲线,以及热裂解过程中H2O、CO2、CO、NH3和CH4等气体物质的释放量.结果表明,裂解气氛不同可以显著地影响样品的热裂解过程,在氮气和空气的氛围下,样品的热分解均主要发生在200-500℃,700℃以后热失重很缓慢.在氮气氛围下固体残留物的量约为25%,而在空气氛围下约7-9%.通过热裂解气-质联用技术,在600、700、800、900和1000℃温度下将样品进行热裂解,然后对裂解产物进行了定性和半定量分析,针对烟气中的一些裂解特征物质,探讨裂解温度以及裂解气氛对裂解行为的影响.
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