scavenger

https://doi.org/10.1351/goldbook.S05495
A substance that reacts with (or otherwise removes) a trace component (as in the @S05496@ of trace metal ions) or traps a reactive reaction @I03096@.
See also:
inhibition
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1162 [Terms] [Paper]