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

Table 1

Mean deposited mass values obtained from the single unit QCM [15] (𝑛=5) compared to the 3-in-1 QCM unit (𝑛=15); the percentage difference between mean mass detected by the two tools; the 𝑃 values indicating no significant difference between tools at all dilutions tested. For the single unit, the values were the mean of 5 repeat experiments with the QCM (in position 2 of the chamber) [15]; for the triplicate QCM the values were the mean of 5 repeat experiments and 3 QCM positions per repeat (𝑛=15).

	Mean deposited mass (𝜇g/cm^2) ± SD
Dilution (1 : 𝑋)	5	10	25	100	400
Single unit	25.75 ± 2.30	10.51 ± 0.42	3.29 ± 0.24	0.69 ± 0.09	0.22 ± 0.03
Triplicate unit	28.00 ± 2.25	11.51 ± 1.81	3.64 ± 0.72	0.75 ± 0.20	0.21 ± 0.06
Difference (%)	8.4	4.5	5.2	4.9	2.3
𝑃 value	0.071	0.245	0.304	0.503	0.573