热裂解-GC/MS评估烟草苯系物产生量的影响因素

本研究以带有吸附阱的热裂解装置作为裂解反应器,采用高温裂解、低温吸附后热脱附并结合GC/MS在线检测的方法,测定了空气氛围中不同裂解条件下烤烟裂解产生的苯系物(包括苯、甲苯、对二甲苯、苯乙烯、邻/间二甲苯).实验中考察了裂解条件的变化对裂解产物中苯系物产生量的影响,考察的因素包括:裂解终温(600℃、700℃、800℃...

Effects of Pyrolysis Condition on the Generation of Benzene and Associated Volatile Compounds in Tobacco

Benzene,toluene,xylene and styrene generated from pyrolyzed tobacco leaves were determined by a pyrolysis-GC-MS system coupled with an adsorption trap.The effects of different pyrolysis conditions on the generation of benzene and associated volatile compounds were investigated,including the final pyrolysis temperatures(600 ℃~1000 ℃),retention times of final pyrolysis temperatures(0 s-20 s),retention times of initial pyrolysis temperature(0 s~20 s)and heating rates(30 ℃/s~500 ℃/s).The final pyrolysis temperature showed the highest influence on the releasing of benzene and associated volatile compounds,followed by the heating rate of the temperature.The retention time at the initial or final pyrolysis temperatures had no significant effects on the releasing of benzene and associated volatile compounds.The optimized pyrolysis conditions were determined for detection of the benzene and associated volatile compounds by using pyrolysis-GC-MS.