Arbitrary reciproc threshold mass concentration (arb.recip.threshold mass c.)

by | Feb 5, 2020 | List of kinds-of-property, Kind-of-quantity

Arbitrary reciproc threshold mass concentration (arb.recip.threshold mass c.)

Abbreviation

 Arb.recip.threshold mass c.

Definition in words

 Volume of system 1 divided by arbitrary threshold mass of component B

Definition by equation

Note: kprocedure is a constant defined by the measurement procedure (there is an approximately proportionality to a kind-of-quantity from the International System of Quantities).

Result type

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

Unit

 International unit (IU) or procedure defined unit (p.d.u.) (non-SI units)

Special rule(s) in the NPU syntax

“Procedure” is stated in the specification to the kind-of-property in the NPU definition.

“Procedure” indicates that the measurement procedure must be stated somewhere else than the NPU code and there may be difficulties in comparing values for the same NPU code.

If the unit is an International Unit (IU), an international certified reference material (e.g. WHO reference material) is specified in the specification to the kind-of-property.

If there exist no international certified reference material, the laboratory can specify the unit at the placeholder, procedure defined unit.

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

Allergology

 
 Generic abbreviated
 NPU58382 Basocs(B)—Cladosporium herbarum activated basophilocyte; arb.recip.threshold mass c.(m2; proc.) = ? (p.d.u.)
Full result NPU58382 Basophilocytes(Blood)—Cladosporium herbarum activated basophilocyte; arbitrary reciprocal threshold mass concentration(m2; procedure) = 100 L/arbitrary unit
Abbreviated result NPU58382 Basocs(B)—Cladosporium herbarum activated basophilocyte; arb.recip.threshold mass c.(m2; proc.) = 100 L/arbitrary unit
Written expression The arbitrary reciprocal threshold mass concentration of Cladosporium herbarum activated basophilocyte of basophilocytes in Mr Smith’s blood is [100] L/arbitrary unit.
Equation

 Notes
 “Arbitrary unit” was chosen by a local laboratory as a proprietary measurement unit.and not an accepted international unit.

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

        • Arbitrary reciproc threshold mass concentration

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
2019-01-04 Arbitrary reciproc threshold mass concentration Term established

NPU term identifier

 QU106121