Testing principle of 919SZ nanoparticle size and Zeta potential analyzer

Principle of Measuring Particle Size Distribution - Dynamic Light Scattering (DLS) MethodBased on particle Brownian motion, when laser is irradiated on tiny particles dispersed in a liquid medium, the frequency shift of scattered light is caused by Brownian motion, resulting in dynamic changes in the scattered light signal over time. The magnitude of this change is related to the Brownian motion speed of the particles, which in turn depends on the size of the particle size. Large particles have lower Brownian motion speed, while small particles have higher Brownian motion speed. Relevant functions are obtained through correlation operations to obtain particle size information.

Principle of Zeta potential measurement - principle of electrophoretic light scattering (ELS) methodCharged particles undergo electrophoretic motion in the opposite direction to the electrode under the action of electric field force, and the electrophoretic velocity per unit electric field strength is defined as electrophoretic mobility. During electrophoretic migration, particles move together with tightly adsorbed layers and partially diffused layers, forming a sliding surface with the liquid. The potential difference between the sliding surface and the interior of the liquid is the zeta potential. The relationship between Zeta potential and electrophoretic mobility follows the Henry equation, and the Zeta potential of particles can be obtained by measuring their electrophoretic mobility in an electric field.

Application fields of 919SZ nanoparticle size and Zeta potential analyzer

Synthesis and functional research of nanoparticlesOptimization of drug delivery systemQuality control during the manufacturing processBasic research on electrophoretic physics◆ Study on stability of cosmetics and industrial lotionPreparation and synthesis process optimization of nanoparticlesAdvanced colloidal stability analysis and optimization◆ Characterization of Polymers