specific photoadsorption number

https://doi.org/10.1351/goldbook.14090
Maximum number of entities (molecules, atoms or radicals) adsorbed as a result of irradiation divided by the surface area and by the mass of adsorbent.
Note: This definition, per area and per mass, is misleading. It is included for historical reasons and was originally called specific photoadsorption capacity.
Source:
PAC, 2011, 83, 931. (Glossary of terms used in photocatalysis and radiation catalysis (IUPAC Recommendations 2011)) on page 989 [Terms] [Paper]