substance content, \(n/m\)

https://doi.org/10.1351/goldbook.S06073
Amount-of-substance of a component divided by the mass of the system.
Notes:
  1. The term @C01209@ is recommended for clinical chemistry, ISO uses 'substance'.
  2. The term @S06234@ is recommended for clinical chemistry, ISO uses @M03949@.
  3. Use of the term level as a synonym for content is deprecated.
  4. In describing a quantity, @C01296@ must be clearly differentiated from @C01222@.
Source:
PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 994 (https://doi.org/10.1351/pac199668040957)