What does impregnated carbon mean in practice?
The added reagent reacts with a specific gas or compound, extending the effects of the carbon beyond simple physical adsorption.
When does it matter?
Impregnation is targeted and may not work on other pollutants; humidity, pH and reagent consumption are important.
Which solutions are related to it?
A product formulated for the assayed compound is selected and a replacement point is determined based on a post-filter test.