heliumpycnométer
The heliumpycnometer is a laboratory instrument used for determining the density of solids, particularly powders. Its operation relies on the principle of Archimedes' principle, but instead of liquid, it uses helium gas as the displacement medium. Helium is chosen due to its small atomic size and inert nature, which allows it to penetrate even the smallest pores and crevices of a sample, thus providing a more accurate measurement of the true solid volume.
The process typically involves sealing a known mass of the sample into a chamber. Helium gas is
Heliumpycnometers are valuable in various scientific fields, including materials science, pharmaceuticals, and geology. They are particularly