Catalytic activity of the component divided by the mass of the system.
- In clinical chemistry the component is usually an enzyme.
- The term catalytic content is accepted for use in clinical chemistry.
- Use of the term level as a synonym for concentration is deprecated.
- In describing a quantity, content must be clearly differentiated from concentration.
PAC, 1996, 68, 957
(Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996))
on page 964
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook