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.
Helium? Not heavy inert gases; small/fixed volumes times low densities equal small masses?Lord Jestocost said:uses a helium gas pycnometer.
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?
Density is a measure of how much mass is contained within a given volume of a material. It is important to measure density because it can provide valuable information about the physical properties and composition of a material, and can also be used to identify and classify different substances.
The most commonly used units for density are grams per cubic centimeter (g/cm3) or kilograms per cubic meter (kg/m3). However, other units such as pounds per cubic inch (lb/in3) or pounds per gallon (lb/gal) may also be used depending on the context.
The density of a material can be measured by dividing its mass by its volume. The mass can be measured using a balance or scale, while the volume can be determined by measuring the dimensions of the material or using displacement methods.
Density and specific gravity are related but not the same. Density is an absolute measure of how much mass is contained within a given volume, while specific gravity is a ratio of the density of a substance to the density of a reference substance (usually water). Specific gravity is a unitless quantity, while density is typically expressed in mass per unit volume.
Temperature can have a significant impact on the density of a material. In general, as temperature increases, the density of a material decreases. This is because most substances expand when heated, causing the same mass to occupy a larger volume. This is why it is important to specify the temperature at which density measurements are taken.