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

In this set-up, finely powdered and granular adsorbents are exposed to 2 ppm formic acid at 50% RH for 12 weeks. Periodically samples are removed for monitoring the progress of the exposure. Samples are analyzed using thermalgravimetry (TG), differential thermal analysis, and evolved gas analysis in one operation. Separately, total weight % carbon, nitrogen, hydrogen, and sulfur are analyzed to support the TG analysis. Photo: Jeffrey Levin.