CONSTRUCCIóN Y CALIBRACIóN DE UNA CELDA DE SEDIMENTACIóN GRAVIMéTRICA PARA LA MEDICIóN FOTOMéTRICA DE LA DISTRIBUCIóN DE TAMA？O DE MICRO PARTíCULAS

this paper present the theoretical basis, development, implementation and results of from a gravimetric sedimentation cell for determination of size distribution and median diameter of a sample of micro particles. the measurement is based on the transmittance of light through a suspension particles in water. the cell was built in modular form and was calibrated with suspensions of amorphous silicion dioxid with a median diameter of 1.5 μm. the results indicate that the sedimentation cell is very simple to use and that the size distribution of micro particles can be determined at low cost. this procedure may be conveniently applied in the many industrials processes.