Monodisperse suspensions turbidity

For a monodisperse suspension with N non-absorbing spherical particles per cm3, in absence of multiple scattering, the turbidity, t, is given by ... 

For a given weight (or volume) of material, initially composed of monodisperse singlets of very small size so that Rayleigh s law is obeyed (dsuspension turbidity will increase as the third power of the ratio of the aggregate radius to the... 

Particles can be broadly classified as either colloids or as macroparticulate powders. Colloids typically have dimensions smaller than 1000 A and are optically transparent, while dispersed powders are generally larger and form turbid suspensions. Neither colloidal dispersions nor powder suspensions are usually monodisperse, and to the extent that particle size can influence attainable surface charge and area, many such systems will typically reflect a distribution of properties as a function of preparation method. Recent advances in synthetic techniques for providing materials with reduced polydispersity are likely to allow for better characterization of these effects in the near future. 

Numerical calculations by Mic s theory for model gamma distribution of particles and experiments with bimodal latex suspensions have shown (Khlebtsov and Mel nikov, 1992) the mean particle size determined by the turbidity spectrum method from n(r) calibrations for monodisperse particles to correspond to the relationship... 

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