IUPAC - conventional mass (09039)

conventional mass

symbol:

m_{c}

https://doi.org/10.1351/goldbook.09039

Mass of a body that is balanced by a standard mass under conventionally chosen conditions.

Notes:

The International Organization of Legal Metrology recommends that the conventionally chosen conditions are: reference temperature, $t_{r e f} = 20^{\circ} C$ , density of air as a reference value, $ρ_{0} = 1.2 kg m^{- 3}$ ; reference density of standard weight, $ρ_{c} = 8000 kg m^{- 3}$ . In this case, the conventional mass is related to the mass ( $m$ ) and density ( $ρ$ ) of the object by $m_{c} = m \frac{1 - ρ_{0} / ρ}{1 - ρ_{0} / ρ_{c}}$
The base unit of the quantity "conventional mass" is the kilogram.

Source:
PAC, 2025, 97, 137. (Glossary of terms for mass and volume in analytical chemistry (IUPAC Recommendations 2024)) on page 3 [Terms] [Paper]

Citation: 'conventional mass' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.09039 RIS BibTex EndNote

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conventional mass