Table 2.

Summary of calculated 3R4F particulate deposition on inserts within the exposure chamber (μg/cm²).

Smoke dilution (smoke:air, v/v)	Equivalent 3R4F particulate deposition (μg/cm2)
1:5	60.74 ± 2.07
1:10	29.47 ± 1.30
1:25	11.33 ± 0.59
1:50	5.50 ± 0.58
1:100	2.67 ± 0.13
1:250	1.03 ± 0.11
1:400	0.63 ± 0.09

Chambers were exposed to various whole smoke dilutions during a 30 minute exposure to 3R4F reference cigarettes smoked at the ISO regime. Particles deposited on inserts were measured by fluorescence detection. Deposited particulate matter was eluted with a solvent and quantified against a standard curve produced from 3R4F cigarette smoke total particulate matter.