Sedimentation dielectric methods

Dielectric Sedimentation Method. The measurement relies upon the sensing of changes in the dielectric constant of medium between a pair of capacitance sensing plates placed around the sedimentation tube. 

The 2eta potential (Fig. 8) is essentially the potential that can be measured at the surface of shear that forms if the sohd was to be moved relative to the surrounding ionic medium. Techniques for the measurement of the 2eta potentials of particles of various si2es are collectively known as electrokinetic potential measurement methods and include microelectrophoresis, streaming potential, sedimentation potential, and electro osmosis (19). A numerical value for 2eta potential from microelectrophoresis can be obtained to a first approximation from equation 2, where Tf = viscosity of the liquid, e = dielectric constant of the medium within the electrical double layer, = electrophoretic velocity, and E = electric field. 

Method Viscosity Diffusion Sedimentation NMR DSC Dielectric Isopiestic Range... 

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