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Información tecnológica

On-line version ISSN 0718-0764


SALINAS-SALAS, G.; STINTZ, M.  and  WESSELY, B.. Application of a Photometric Method to Detect Size Distribution of Micro Particles. Inf. tecnol. [online]. 2005, vol.16, n.4, pp.59-68. ISSN 0718-0764.

This study deals with the theoretical basis, development, implementation and results obtained when using a gravimetric sedimentation cell to detect the size distribution and the average diameter of a sample of microscopic particles using an optical system based on the measurement of the extinction or decline of a photon flux from a beam of light passing through an aqueous suspension of the particles in question. The cell was built in modular form and its calibration and tests were done using a suspension composed of known-size particles of amorphous silicon dioxide (Geltech S 1500) with a nominal average diameter of 1.5 μm in water. The results showed that it was possible to determine the size distribution of the micro-particles with precision and at low cost, which could permit its' useful application in industry.

Keywords : suspended particles; photometric measurement; sedimentation; size distribution.

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