Multi-angle dynamic light scattering (MADLS®) available on the Zetasizer Ultra delivers an angular-independent particle size distribution (PSD) with increased resolution by combining scattering information from multiple angles. The measurement provides improved insight into all particle size populations present in the sample, as populations that may be weakly scattering at one detection angle, are revealed in the other detection angles, and brought into the combined-angle PSD. In this technical note we explain the basic principles behind the MADLS measurement and demonstrate the benefits for a mixture of polystyrene spheres of different sizes.




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