In analytical plasma spectrometry the dropled size distribution, produced by a sample introduction system is essential in a few directions. Conclusions: about the nebulizer and spray chamber design parameters, may be drawn1,2as well as about phenomena related to the transport of droplets from the nebulizer to the plasma, and about phenomena related to the desolvation of droplets and volatilization and dissociation processes associated with residual solid particles in plasma. One of the methods for investigating droples size distribution is investigating the size distribution of desolvated particles3,4.