气袋-热脱附-气/质联用法分析卷烟主流烟气中的气相全成分

为了分析比较不同卷烟的气相成分的差异，以及减害降焦过程中卷烟气相成分的变化情况，本文建立了气袋-热脱附-气/质联用法分析卷烟主流烟气中的气相全成分的方法。此方法采用Tedler气袋收集20支卷烟的主流烟气，并用针筒式注射泵定量转移一定体积烟气入Carbotrap300吸附采样管，利用热脱附技术-气/质联用仪(ATD-GC/MS)法进行定性和定量分析。通过方法优化和验证，结果表明:(1)由于针筒式注射泵的取样时间、速率及体积高度可控，大大改进了重复性，气相全成分中，大部分被测物的相对标准偏差都在5%以下，重复性显著优于文献报道；(2)此方法可较完全地捕集卷烟主流烟气气相成分；(3)可定性鉴定出卷烟烟气中的67种成分；(4)采用氘代内标法，准确定量分析了13种气相成分；(5)13种定量成分的回收率在80%~120%之间，结果令人满意。对不同卷烟样品进行分析测试，结果如下:(1)2R4F的测试结果和文献报道值相符；(2)混合型卷烟的气相成分中，含N的气体成分比烤烟型的相对高些；(3)对卷烟滤嘴添加了活性炭材料前后的卷烟分析，可发现，添加了活性炭材料后，大部分气相成分呈不同程度地下降。综合比较认为此方法方便可靠，可应用于日常分析以及对减害材料的评价研究。 

Analysis of Vapour Phase Componets inMainstream Smoke by Bag Sample-Thermal Desorption-Gas Chromatography/Mass Spectrometry

A method for the analysis of vapour phase (VP) compounds in mainstream smoke (MSS) was described. Cigarettes were smoked on a rotary smoking machine under the standard ISO smoking conditions and the VP that passes through the Cambridge filter pad collected in a Tedlar? bag. On completion of smoking, the bag contents were sampled onto Two Carbotrap 300 adsorption tube containing 3 beds of adsorbents (Carbopack C, Carbopack B and Carboxen III). The tube was subsequently analyzed on an automated thermal desorption (TD) system coupled to a gas chromatography- mass spectrometry (GC/MS) using a VOCOL column. The ATD and GC operating parameters were optimized. The VP of MSS produced by reference cigarette 2R4F and 4 other cigarettes were determined. The results indicated that: 1) the VP compounds in MSS were basically completely trapped by Carbotrap 300. 2) 67 components were identified; 3) The response of GC/MS was found to be linear with the concentration of 13 analytes in the different range; 4) The relative standard deviation (RSD) of 67 components were less than 10%; 5) Satisfactory recoveries were obtained with independent check standards; 6) The Results for the University of Kentucky reference cigarette 2R4F were in good agreement with reported values; 7) The delivery of Propanenitrile and Acetonitrile in MSS of blend type cigarette was higher than which of flue-cured type cigarette; 8)The VP compounds in MSS could be selective filtered by activated carbon.