Relative volumic mass (rel.volumic mass) - Dynamic NPU Manual

Relative volumic mass (rel.volumic mass)

by | Feb 4, 2020 | List of kinds-of-property, Kind-of-quantity

Relative volumic mass (rel.volumic mass)

Synonyms

 Relative mass density

Abbreviation

 Rel.volumic mass

Definition in words

Volumic mass of system 1 divided by volumic mass of system 2

Note 1: System 1 is not related to system 2

Note 2: Volumic mass (mass density) is mass of system divided by volume of the same system. The coherent unit is e.g. g/L.

Definition by equation

Where

Systematic terms

 Relative volumic mass of component B in system 1

Result type

 Rational scale
  • Value sets are positive numerical values
  • Algebraic operations are allowed (a=nb; a≠nb)
 Numerical values from 0-∞

Unit

10-6, 10-3, 1 (one), 103, 106, etc.

The unit “1” (one) is ommited in the NPU syntax.

Non-recommended terms

 Relative density, specific gravity, specific weights

Reference

 Ferard G, Dybkaer R, Fuentes-Arderiu X. Compendium of Terminology and Nomenclature of Properties in Clinical Laboratory Sciences : Recommendations 2016. 1 ed: Royal Society of Chemistry; 2016. 182 p. Doi:10.1039/9781782622451.

Laboratory field

Examples

Clinical Chemistry

 Example 1
Generic abbreviated
 NPU03694 Pt—Urine; rel.volumic mass(20 °C/water, 20 °C; proc.) = ?
Full result NPU03694 Patient—Urine; relative volumic mass(20 °C/water, 20 °C; procedure) = 1.18 x one
Abbreviated result NPU03694 Pt—Urine; rel.volumic mass(20 °C/water, 20 °C; proc.) = 1.18
Written expression The relative volumic mass of Mr. Smith’s Urine is [1.18]. The calculation is performed by dividing the volumic mass of Mr. Smith’s Urine with the volumic mass of water. The measurements in urine and water are performed at 20 °C according to procedure defined by the laboratory.
Equation

Example 2
Generic abbreviated
 NPU10184 Pt—Amniotic fluid; rel.volumic mass(20 °C/water, 20 °C; proc.) = ?
Full result NPU10184 Patient—Amniotic fluid; relative volumic mass(20 °C/water, 20 °C; procedure) = 1.60 x one
Abbreviated result NPU10184 Pt—Amniotic fluid; rel.volumic mass(20 °C/water, 20 °C; proc.) = 1.60
Written expression The relative volumic mass of Mrs. Smith’s Amniotic fluid is [1.60]. The calculation is performed by dividing the volumic mass of Mr. Smith’s Amniotic fluid with the volumic mass of water. The measurements in Amniotic fluid and water are performed at 20 °C according to procedure defined by the laboratory.
Equation

Reference

 NPU database, https://www.ifcc.org/ifcc-scientific-division/sd-committees/c-npu/npusearch/ 

  • Kind-of-property

    • Nominal kind-of-property

    • Kind-of-quantity

      • Unitary kind-of-quantity

        • Rational unitary kind-of-quantity

          • Relative volumic mass

Reference
  • Dybkaer R. Concept system on ‘quantity’: formation and terminology. Accredit Qual Assur. 2013;18(3):253-60.
  • Dybkaer R. ISO terminological analysis of the VIM3 concepts ‘quantity’ and ‘kind-of-quantity’. Metrologia. 2010;47(3):127-34.
Date Term Note
1996-01-01 Relative volumic mass Term established

NPU term identifier

 QU50121