Relative substance fraction (rel.subst.fr.)

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

Relative substance fraction (rel.subst.fr.)

Abbreviation

 Rel.subst.fr.

Definition in words

Substance fraction of component B in system 1 divided by substance fraction of component B in system 2

Note: System 1 is not related to system 2

Definition by equation

Systematic terms

 Relative substance fraction 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.

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 Microbiology

 Example 1
Generic abbreviated
 NPU29742 Corpus vitreum(spec.)—Toxoplasma gondii antibody(IgG/tot. IgG); rel.subst.fr.(Corpus vitreum/Plasma; proc.) = ?
Full result NPU29742 Corpus vitreum(spec.)—Toxoplasma gondii antibody(Immunoglobulin G/total Immunoglobulin G); relative substance fraction(Corpus vitreum/Plasma; procedure) = 0.7 x one
.Abbreviated result NPU29742 Corpus vitreum(spec.)—Toxoplasma gondii antibody(IgG/tot. IgG); rel.subst.fr.(Corpus vitreum/Plasma; proc.) = ?
Written expression The relative substance fraction of Toxoplasma gondii antibody(Immunoglobulin G/total Immunoglobulin G) from Mrs. Smith’s Corpus vitreum is [0.7]. The calculation is performed by dividing the substance fraction of Toxoplasma gondii antibody(Immunoglobulin G/total Immunoglobulin G) in Mrs. Smith’s Corpus vitreum with the substance fraction of Toxoplasma gondii antibody(Immunoglobulin G/total Immunoglobulin G) in Mrs. Smith’s plasma. The measurement is performed according to procedure defined by the laboratory.
Equation

Example 2
Generic abbreviated
 NPU29738 Corpus vitreum(spec.)—Herpes simplex virus antibody(IgG/tot. IgG); rel.subst.fr.(Corpus vitreum/Plasma; proc.) = ?
Full result NPU29738 Corpus vitreum(spec.)—Herpes simplex virus antibody(Immunoglobulin G/total Immunoglobulin G); relative substance fraction(Corpus vitreum/Plasma; procedure) = 0.2 x one
Abbreviated result NPU29738 Corpus vitreum(spec.)—Herpes simplex virus antibody(IgG/tot. IgG); rel.subst.fr.(Corpus vitreum/Plasma; proc.) = 0.2
Written expression The relative substance fraction of Herpes simplex virus antibody(Immunoglobulin G/total Immunoglobulin G) from Mrs. Smith’s Corpus vitreum is [0.2]. The calculation is performed by dividing the substance fraction of Herpes simplex virus antibody(Immunoglobulin G/total Immunoglobulin G) in Mrs. Smith’s Corpus vitreum with the substance fraction of Herpes simplex virus antibody(Immunoglobulin G/total Immunoglobulin G) in Mrs. Smith’s plasma. The measurement is performed according to procedure defined by the laboratory.
Equation

Reference

 NPU database, https://www.ifcc.org/ifcc-scientific-division/sd-committees/c-npu/npusearch/ and http://www.labterm.dk/default.aspx

  • Kind-of-property

    • Nominal kind-of-property

    • Kind-of-quantity

      • Unitary kind-of-quantity

        • Rational unitary kind-of-quantity

          • Relative substance fraction

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
2014-09-25 Relative substance fraction Term established

NPU term identifier

 QU102223