Determination of particle size distribution of small aerosol particles of unknown refractive index by a light-scattering method

Abstract

A light-scattering method is presented which provides the particle size distribution and the refractive index of small aerosol particles by measuring the intensities of scattered light at the scattering angles of 45, 90, and 135° with varying wavelengths of the incident beam. This method was applied to the particles of dioctyl phthalate, cigarette smoke, and incense smoke. The good agreement of the refractive indices obtained by this method with the ones measured by Abbe refractometer seems to support the usefulness of this method.