Inhalation simulation and the effects of lung environmental conditions on consumer aerosol products and NaCl aerosol

The use of an inhalation simulation apparatus to determine the effects of conditions of 98% relative humidity and 37°C temperature on the size distribution of aerosol particulates is demonstrated. Ten common household and cosmetic aerosol products and NaCl aerosol were sampled from the apparatus by the Single Particle Aerodynamic Relaxation Time (SPART) analyzer. Some products, such as the spray powder antiperspirant, spray lubricant, and furniture polish, showed little increase in count and mass median aerodynamic diameter under humid conditions. The size distribution of other products, such as oven cleaner, air freshener, insecticide, and pump spray antiperspirant, shifted such that the mass median aerodynamic diameters increased two- to fourfold.