Nanoparticles with diameters from 1 - 100 nm are used in large quantities f
or very different applications. A precise determination of the important ph
ysical quantities (which are responsible for the application properties) su
ch as diameter, particle size distribution, and surface is therefore very e
ssential. The most common methods for the determination of these quantities
are analytical ultracentrifugation (AUC) and dynamic light scattering (DLS
). The paper demonstrates the techniques of getting a precise characterizat
ion of nanoparticles and suggests a new method for the correction of the se
dimentation coefficient and its distribution with respect to the diffusion
coefficient.