Particle size distribution measurements of titanium dioxide with atanase an
d rutile crystal structures have been presented. The measurements were carr
ied out with the Sedigraph ET 5000 apparatus and the disk centrifuge BI-XDC
. Statistical evaluation of the results was performed for particle portions
up to 1 micron and the mean particle size d(50) This evaluation substantia
tes a good agreement between the data obtained by both instruments.