Emergency Response and Air Toxicants Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, NE MS F-47, Atlanta, GA 30341, USA.
Tob Control. 2010 Jun;19(3):223-30. doi: 10.1136/tc.2009.032680.
It has been reported that charcoal added to cigarette filters selectively removes many of the more volatile chemicals, but it is not clear to what extent charcoal may reduce the delivery of important less volatile chemical constituents in mainstream cigarette smoke.
We analysed machine-derived mainstream smoke deliveries (under three smoking regimens) for variants of a charcoal-filtered cigarette commercially test-marketed in the USA, focusing on selected polycyclic aromatic hydrocarbons (PAHs), phenols and tobacco-specific nitrosamines (TSNAs).
While charcoal-containing filters selectively removed lower molecular weight PAHs from mainstream smoke, they did not significantly remove the heavier and more toxic PAHs studied, such as benzo[a]pyrene, a known carcinogen. Likewise, charcoal-containing filters removed phenols and TSNAs from mainstream smoke to differing amounts depending on the compound, filter design and the smoking regimen.
The addition of sufficient charcoal to cigarette filters is known to remove many volatile compounds and can potentially reduce deliveries of certain semi-volatile compounds under some machine smoking regimens. Less volatile compounds, with a significant portion in the particulate phase, are less available for selective filtration by charcoal-containing filters than the more volatile compounds that reside predominantly in the gas phase.
据报道，添加到香烟过滤嘴中的木炭可以选择性地去除许多挥发性较强的化学物质，但目前尚不清楚木炭在多大程度上可以减少主流香烟烟雾中重要的挥发性较低的化学成分的释放。
我们分析了在美国商业化试销的一种带有木炭过滤嘴的香烟的机器生成主流烟雾输送量（在三种吸烟方案下），重点关注选定的多环芳烃（PAHs）、酚类和烟草特异性亚硝胺（TSNAs）。
虽然含炭过滤器可以从主流烟雾中选择性地去除低分子量的 PAHs，但它们并没有显著去除研究中更重、毒性更大的 PAHs，如苯并[a]芘，一种已知的致癌物质。同样，含炭过滤器从主流烟雾中去除酚类和 TSNAs 的量因化合物、过滤嘴设计和吸烟方案而异。
已知向香烟过滤嘴中添加足够的木炭可以去除许多挥发性化合物，并可能在某些机器吸烟方案下降低某些半挥发性化合物的释放量。与主要存在于气相中的挥发性较强的化合物相比，具有相当一部分处于颗粒相的挥发性较低的化合物，其通过含炭过滤器进行选择性过滤的可能性较小。
