substance content, n/m

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