Langmuir 1999, 15, 6343-6345
6343
Adsorption Equilibria of Isopropyl Methylphosphonofluoridate (GB) on Activated Carbon at Ultralow Relative Pressures Christopher J. Karwacki,* David E. Tevault, John J. Mahle, James H. Buchanan, and Leonard C. Buettner U.S. Army, Edgewood Research Development and Engineering Center, Aberdeen Proving Ground, Maryland 21010-5423 Received October 20, 1997. In Final Form: May 24, 1999
Adsorption equilibria are reported for isopropyl methylphosphonofluoridate (GB) on activated carbon at relative pressures (pi/ps) approaching 10-10 and temperatures between 30 and 100 °C. A novel desorption method and analytical apparatus employing purge-and-trap chromatography (PTC) were used to overcome the difficulties in quantifying the vapor phase at ultralow concentrations (
