Determination of particle size distribution on aerosols and suspensions byultraviolet-visble-near infrared absorbance measurements. A new procedure for absorbing particles

The determination of particle size distribution on aerosols and suspensions was carried out by ultraviolet-visible-near infrared absorbance measuremen ts following a new procedure for the case of absorbing (complex refractive index) particles. This procedure consists in an analysis of subranges of ra dii where the discretization curve is continuous, taking as final particle size distribution the inverse solution corresponding to the subrange for wh ich the direct problem gives better results (minimum rme value). Following the procedure, silver colloidal particles in water suspensions were analyze d obtaining a retrieved particle size distribution with characteristics tha t agree very well with the manufacturing data.