AAAR 35th Annual Conference October 17 - October 21, 2016 Oregon Convention Center Portland, Oregon, USA
Abstract View
Characterizing Chemical Components of Particles in Thirdhand Tobacco Smoke
XIAOCHEN TANG, Noelia Ramirez Gonzalez, Xavier Correig, Marion Russell, Lara Gundel, Hugo Destaillats, Lawrence Berkeley National Laboratory
Abstract Number: 364 Working Group: Health Related Aerosols
Abstract While tobacco control strategies protect non-smokers from secondhand smoke (SHS) in public places, they are not as effective for indoor environments such as homes, where non-smokers are vulnerable to both SHS and thirdhand smoke (THS), i.e., residual smoke contaminants remaining airborne or absorbed to surfaces. While little is known about the changes in chemical composition of THS as it ages indoors, exploring these changes is critical in understanding its health impacts on occupants.
Fresh tobacco smoke generated in a room-sized chamber at Lawrence Berkeley National Laboratory was sampled at different times after smoking commercially available cigarettes. Semi-volatile and particulate constituents in SHS and THS were collected using a High Capacity Integrated Organic Gas and Particle Sampler (IOGAPS). Samples were collected serially on XAD-coated diffusion denuders (for gases), Teflon-coated glass fiber filters (for particles) and XAD-coated quartz filters (for semi-volatile gases that evaporated from the particles). Targeted and untargeted analyses were carried out to identify and quantify smoke components using gas chromatography coupled with ion trap mass spectrometry (GC-IT-MS$^nn), comprehensive gas chromatography (GC×GC-TOF) and high-resolution quadrupole time-of-flight gas chromatography (GC-Q-TOF) and liquid chromatography (UHPLC-Q-TOF) methods. Target compounds include alkanes, polycyclic aromatic hydrocarbons (PAHs), tobacco-specific nitrosamines (TSNAs) and other potential tracers for tobacco PM. Gas and particle phase chemicals specific to THS could be used as tracers to differentiate SHS from THS, and they could also be included in exposure and harm assessment models to evaluate integrated health risks, thus promoting the advancement of effective environmental and health policies.