摘要
采用热裂解-气质联用（Py-GC/MS）法测定了氮气中不同温度下烤烟、香料烟和白肋烟烟叶样品裂解产生的10种稠环芳烃（PAHs）。结果表明：①550℃以下,烤烟、白肋烟和香料烟样品裂解产物中均未检出PAHs;600℃和650℃下,裂解产物均为芴、菲、蒽、荧蒽、芘;700℃下,烤烟和香料烟样品裂解产物中又检出了苯并[a]蒽、屈艹,而白肋烟样品未检出;750℃下,烤烟和白肋烟样品的裂解产物中又检出了苯并荧蒽、苯并[e]芘、苯并[a]芘,而香料烟样品未检出;800~900℃,3种烟叶样品均检出这10种PAHs;②600~900℃,每种烟叶样品的PAHs量均随着裂解温度的升高呈上升趋势;同一裂解温度下,烤烟、白肋烟和香料烟样品的PAHs产生量有一定的差异。800℃以上,大部分PAHs都是香料烟的产生量最大,白肋烟的最小,而750℃以下并非如此。香料烟样品的PAHs产生量随着裂解温度的升高增幅最大。
Ten PAHs generated by pyrolysis of flue-cured,burley and oriental tobacco samples in nitrogen at different temperatures were determined by pyrolysis-GC/MS.The results showed that 1） when the pyrolytic temperature was below 550 ℃,no PAHs was detected.When the temperature was at 600 ℃ or 650 ℃,fluorene,phenanthrene,anthracene,fluoranthene and pyrene were detected.At 700 ℃,benzo[a]anthracene and chrysene emerged in pyrolysates of flue-cured and oriental tobacco samples,while not in pyrolysate of burley tobacco sample.At 750 ℃,benzo[k]fluoranthene,benzo[e]pyrene and benzo[a]pyrene emerged in flue-cured and burley tobacco pyrolysates,while not in oriental tobacco pyrolysate.From 800 ℃ to 900 ℃,those mentioned PAHs were detected in all samples.2） PAHs yield increased with the increase of pyrolytic temperature from 600 ℃ to 900 ℃,however,it differed to a certain extent between different tobacco samples at same pyrolytic temperature.Over 800 ℃,the yield of most PAHs was highest in the pyrolysate of oriental tobacco and lowest in that of burley tobacco,though it was not below 750 ℃.With the increase of pyrolytic temperature,the PAHs yield of oriental tobacco sample increased more rapidly than did the samples of other two tobaccos.
出处
《烟草科技》
EI
CAS
北大核心
2010年第1期27-31,共5页
Tobacco Science & Technology
