Conservation image Performance of Pollutant Adsorbents (2001–2003)
A project of the Getty Conservation Institute
 

To measure the capacity of adsorbents for single and combinations of gases, permeation and diffusion tubes are used to deliver set concentrations under controlled conditions. Here, laboratory air is preconditioned, the flow rates carefully measured, and adsorbents exposed for periods of from 2 to 4 months. Photo: Jeffrey Levin.