trapping

https://doi.org/10.1351/goldbook.T06492
The interception of a reactive molecule or reaction intermediate so that it is removed from the system or converted into a more stable form for study or identification.
See also: scavenger
Source:
PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1174 (https://doi.org/10.1351/pac199466051077)