To determine the true density of solid powder particles, one therefore generally uses a helium gas pycnometer.epenguin said:Your liquid needs to be one that has no interaction with the solid, i.e. does not adsorb it nor dissolve in it. You don't want the solid floating on the liquid either.
Easier if you can just accept Bulk Density. Weigh the volume measurement container with and without your material. Note the volume measurement. Density, or in such a case, bulk density, is mass (which in your case might need to be "weight") divided by volume.EL AALLAOUI Najla said:yes I have a powder . thank you
"The problem with volume measurement is that object or substance isn't usually in a form of a regular shape but as a deformerd object or as a powder. Using classical method such as water diplacement isn't usually good enough since water could interact and become stuck on the sample surface. Gas pycnometry solves this by utilizing an inert gas and Boyle's gas law."Bystander said:Helium? Not heavy inert gases; small/fixed volumes times low densities equal small masses?