Synonym
|
Hydrogen ion exponent |
Abbreviation
|
pH |
Definition in words
|
Negative decadic logarithm of the relative molal activity of hydrogen ion |
Definition by equation
|
 |
Systematic terms
|
pH of hydrogen ion in system 1 |
|
Result type
|
Logarithmic scale |
- Value sets are numerical values
- Addition and subtraction are allowed (|a-b|=|c-d|; |a-b|≠|c-d|)
- Division and multiplication are not allowed
|
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. |
Laboratory field
|
Examples
|
Clinical Chemistry
|
Example 1 |
Generic abbreviated
|
NPU02412 P(aB)—Hydrogen ion; pH(body temp.) = ? |
| Full result |
NPU02412 Plasma(arterial blood)—Hydrogen ion; pH(body temperature) = 7.46 |
| Abbreviated result |
NPU02412 P(aB)—Hydrogen ion; pH(body temp.) = 7.46 |
| Written expression |
The pH of Hydrogen ion in plasma from Mr. Smith’s arterial blood is [7.46]. The body temperature is 37.6 °C. |
|
Equation
|
|
Reproduction and Fertility
|
Example 2 |
Generic abbreviated
|
NPU02414 SemP—Hydrogen ion; pH = ? |
| Full result |
NPU02414 Seminal Plasma—Hydrogen ion; pH = 7.3 |
| Abbreviated result |
NPU02414 SemP—Hydrogen ion; pH = 7.3 |
| Written expression |
The pH of Hydrogen ion in Mr. Smith’s Seminal plasma is [7.3]. |
| 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
-
Logarithmic unitary 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 |
pH |
Term established |
