Topics in Particle and Dispersion Science

TOT - time-of-transition, a method of particle size analysis that relies on specifying the particle size by measuring a length of time a focused beam moving with a constant velocity spends traversing a particle. This methods yields the (particle) chord length distribution (CLD) for the dispersion. Note that the half-width of the CDL is non-zero even for a population of identical spheres, as the chord length can range from 0 to the sphere diameter. Conversion of CLD to particle size distribution is not trivial. See also Time-of-transition (TOT): Introduction.