Quantification of Cigarette Smoke Particle Deposition In Vitro Using a Triplicate Quartz Crystal Microbalance Exposure Chamber

Figure 5

Deposition when a Cambridge filter pad (CFP) was placed prior to the QCM chamber to trap particulate matter. Cigarettes (3R4F) were smoked at the ISO regime at a dilution of 1 : 5 (smoke : air, v/v) for 1 hour. When the scale is adjusted to see the trace more clearly, note the distinct and repeated “n-shaped” pattern of mass increase and decrease per puff over time. The 3 traces represent the 3 QCMs within the chamber: QCM position 1, bottom; QCM position 2, top; QCM position 3, middle.