aerodynamic, hydrodynamic, optical, electrical) to that of the investigated non-spherical particle. *According to the IUPAC definition, the equivalent diameter of a non-spherical particle is equal to a diameter of a spherical particle that exhibits identical properties (e.g. The refractive index does not have any function in this case. Recalculation of the volume-based distribution to a surface- and number-based one is possible. Recalculation of the intensity-based distribution to a number- and volume-based one is possible when the refractive index of the particles is known. Peak analysis (area under the curve, standard deviation).D, mean volume diameter (De Brouckere Mean Diameter).Polydisperse sample: Peak analysis of particle size distribution graph.The particle’s contribution relates to its volume equivalent to mass for constant density.Intensity fluctuations of scattered light.In this case, the cross-sectional area becomes nearly the same as that of a sphere with equal volume (2).For particles ≤0.1 µm, the definition can be extended into volume-equivalent diameter.Laser diffraction equivalent diameter: diameter of a sphere having on the cross-sectional area the same diffraction pattern as the investigated particle (1).Where kB is the Boltzmann constant, T the absolute temperature, and η the viscosity of the liquid medium, D is the translational diffusion coefficient Diameter of a sphere with the same translational diffusion coefficient D as the particle in the same fluid under the same conditions, defined via the Stokes-Einstein equation:.The final particle size distribution is obtained from the sum of diffraction patterns produced by the particles randomly oriented along the direction of the laser beam.angle (diffraction pattern) is a function of the particle size The diffracted/scattered intensity vs.The movement of dispersed particles causes intensity fluctuations of scattered light, which are measured and converted to particle size and particle size distribution (Stokes-Einstein equation).The velocity of particle movement is a function of the particle size.

Dynamic light scattering results hap