Experience with a high output sulfuric acid aerosol generator

Experience with a high output sulfuric acid aerosol generator suitable for large chamber exposure studies is described. Sulfuric acid aerosol is produced by combining sulfur trioxide (SO3)(g) vapor with water vapor in the exposure chamber air supply. The mass output of the generator is stable over long periods, and the mass median aerodynamic diameter of the aerosol produced is in the submicron size range (0.3-0.6 micrometer).