Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Peat-soil biofilter with butyl stoppers (BS) for gas sampling at the inlet (In), for each 5-cm depth increment, and at the outlet (Out). A flow of humidified air with ethylene (C2H4/air) was applied to the inlet from two mass flow controllers. GP, glass wool plug; RS, rubber stopper; TC, T-connector.
