Author： Knotter D. Martin
Publisher： Taylor & Francis Ltd
ISSN： 0272-6351
Source： Particulate Science and Technology, Vol.25, Iss.5, 2007-09, pp. : 435-447
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Abstract
A mathematical model is presented to compensate for the optical coincidence of particles in a liquid particle counter (LPC) detector, which detects particles by means of light scattering. It compensates for the optical coincidence of particles (1) belonging to the same size category, (2) belonging to different size categories, or (3) promoted from two particles to a single particle, which belongs to the larger particle size category. With this improved method, particle concentration decays are studied in a continuous stirred tank reactor where the liquid is recirculated and filtered. Furthermore, it is found that the latex sphere-calibrated LPC makes large errors in particle sizing, which is caused by the differences between the refractive index (n) of the particles under study: polystyrene latex spheres (0.112-0.204 µm), silica (0.16 and 0.33 µm), and Si3 N4 (< 0.4 µm). this="" implies="" that="" many="" particle-removal="" studies="" based="" on="" light-scattering="" detection="" methods="" become="" unreliable.="">
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