THE DETERMINATION OF PARTICLE SIZE BY LIGHT SCATTERING

A critical study has been made of the various observations necessary for the determination of the size of small dielectric particles by the Debye–Einstein equation, which can take the form:[Formula: see text]The turbidity measurements were made with a Beckman spectrophotometer and those of refractive index with a Zeiss dipping refractometer. This article deals especially with the determination of the turbidity and refractive index gradients. The method was applied to the determination of latex particle size and gave results in good agreement with independent methods.