Mass rate - Dynamic NPU Manual
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# Mass rate

### Synonyms

Mean mass rate, mass flow rate, mass velocity

Mass c.

### Definition in words

Change of mass of component B divided by time elapsed in system 1

### Systematic terms

Mass rate 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

µg/s, mg/hour, g/d, etc.

### 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.

### Clinical Chemistry

Example 1
Generic abbreviated form NPU19848 Pt(U)—M-component; mass rate(proc.) = ? g/d
Full form with a result NPU19848 Patient(Urine)—M-component; mass rate(procedure) = 1.2 gram per day
Abbreviated form with a result NPU19848 Pt(U)—M-component; mass rate(proc.) = 1.2 g/d
Written expression The mass rate of M-component in Mr. Smith’urine is [1.2] g/d. The measurement is performed according to procedure defined by the laboratory.
Equation

### Clinical Pharmacology

Example 2
Generic abbreviated form NPU19777 Pt—Gabapentin(administered); mass rate(p.o.) = ? mg/d
Full form with a result NPU19777 Patient—Gabapentin(administered); mass rate(oral administration) = 300 milligram per day
Abbreviated form with a result NPU19777 Pt—Gabapentin(administered); mass rate(p.o.) = 300 mg/d
Written expression The mass rate of oral administered Gabapentin to Mr. Smith is [300] mg/d.
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

• ## Kind-of-quantity

### 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 Mass rate Term established

QU50028