![]() And, as shown in Figure 1 below, the size range over which each instrument is useful overlaps significantly.įigure 1: Size ranges of common particle analysis techniques. Both techniques analyze the data using the assumption that the particle is a perfect sphere. angle is a direct function of particle size. Laser diffraction (LD) analysis, also known as static light scattering, is the most common method for the determination of particle size distributions other than traditional sieve analysis. Particle motion is less important since scattered intensity vs. In laser diffraction, particle size is determined from the measured variation in the intensity of scattered light as a function of scattering angle. Microtrac MRB is a leading supplier of laser diffraction systems (static light scattering), a versatile method for particle size. For these measurements, particle motion is important to the results. angle is a direct function of particle size. The diffusion coefficient, and hence the hydrodynamic radii calculated from it, depends on the size and shape of macromolecules. When compared to dynamic light scattering (DLS), Particle motion is less important since scattered intensity vs. Particle motion is interpreted as free diffusion and converted to size. Dynamic light scattering (DLS), also known as photon correlation spectroscopy (PCS), is a very powerful tool for studying the diffusion behaviour of macromolecules in solution. In dynamic light scattering, particle motion is determined from measured fluctuations in the intensity of scattered light. The various process steps for ink manufacture include chemical mixing, colloidal stability, grinding/milling and dilution which allow demonstration of the. Therefore, the question of which to choose is common.įirst, let us briefly review the techniques. Mie theory, however, does consider other light scattering phenomena, and consequently requires knowledge of the particles refractive index and absorption. HORIBA offers both the LA-960V2 Laser Diffraction Particle Size Analyzer and the SZ-100V2 Dynamic Light Scattering Analyzer for nanoparticle (submicron) particle characterization. ![]() Sometimes, there is a clear reason to choose one or the other. For many nanoparticle or submicron particle size samples, both laser diffraction and dynamic are viable analysis techniques. ![]()
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