Ratio of the amount-of-substance of the component to the total amount-of-substance
in the system containing the component.
Notes:
-
The term substance fraction is recommended for clinical chemistry, IUPAC also uses
mole fraction and amount fraction.
-
For clinical chemistry the term component is recommended, ISO uses "substance".
-
For clinical chemistry the term system is recommended, ISO uses mixture.
Source:
PAC, 1996, 68, 957
(Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations
1996))
on page 994
