Coefficient - Dynamic NPU Manual


Definition by words Coefficient is the denominator kind-of-quantiy that belongs to ISQ system and must be specified.
Scope Coefficient is used when there exist no specific concepts and expressions, like “mass concentration,” “substance content”´or “volume fraction”

Rule 1: The coefficient is not the same . E.g. mass

Rule 2: Component B is the quotient of component F and component G

Rule 3: Component F ≠ Component G (≠ = “not equal to”)

Rule 4: Component F ∉ Component G (∉ = “is not an element of”)


Catalytic-activity coefficient of component B is defined as: Catalytic-activity of componen F divided by kind-of-quantity of component G in system 1.

Note: The coefficient must be specified in the NPU definition. E.g.  catalytic coefficient of component B (Catalytic-activity of component F/Amount-of-substance of component G)

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.