Size distribution of ultrafine particles in KDP aqueous solutions

Quantitative and qualitative investigations on the size distribution of ultrafine particles in KDP solutions were performed by a laser light scanning particle counter and by comparing with scattering polystyrene particles of standard size. The ultrafine particles are of a size distribution from <70 nm to 2000 nm, and the density of the particles sharply decreased with increasing particle size. Most of them were smaller than 100 nm, and almost no particles were >1000 nm. The size of the visual particles, which are distinguished individually by a laser light-scattering technique,3 was estimated in the size range from 200 nm to 1000 nm. The reliability of the results was evaluated.