Density of solids, powders and liquids

ISO 1183-1
ISO 18754
ISO 23145-1
ISO 23145-2

Mettler Toledo XS205DU analytical balance with density measurement kit
In-house and standard-compliant test setup for determining the tapped and untapped density
Drying cabinets and desiccators as required

Bulk density, apparent solid density or apparent porosity (ISO 18754, method A2): according to Archimedes' principle (measurement of buoyancy force). The density of a solid is determined using a liquid whose density is known. The solid is weighed once in air and then in the auxiliary liquid.
Geometric bulk density (ISO 18754, method B): via the volume from the geometrically determined dimensions and the weight.
Density of a liquid: with the aid of a displacer whose volume is known. The displacer is weighed once in air and then in the liquid whose density is to be determined.
Tapped density (ISO 23145-1): The mass of a known volume of powder is determined after the powder is allowed to fall freely into a stationary container and then tapped under specified conditions until saturation density is reached. Dividing this mass by the volume of the container gives the tapped density of the powder.
Untapped density (ISO 23145-2): The mass of a known volume of powder is determined after the powder is filled into a stationary container in a free-falling manner while avoiding vibrations. The test mass divided by the powder volume after the test gives the untapped density of the powder.

Which products can be tested at the RMS?

We test all products. If your materials do not comply with the above standards, please contact us and we will discuss your individual problem.

What needs to be considered with these methods and samples?

Solids can be measured in the form of cuboids, cylinders or any geometry.

The tapped and untapped density can be determined on granulated or non-granulated powders (granules < 5.0 mm). A test volume of at least 15 cm³ is required, but this can potentially be reduced on request.

Are the RMS analyses accredited?

RMS is an ISO/IEC 17025 accredited analytical laboratory (accreditation type C). Density determinations according to the above mentioned standards are already validated and accredited. New or customer-specific analysis methods can be validated by us.