Reference isotherms for water vapor sorption on nanoporous carbon: results of an interlaboratory study
Huong Giang T. Nguyen, Blaza Toman, Roger D. van Zee, Carsten Prinz, Matthias Thommes, Riaz Ahmad, David Kiska, Jamie L. Salinger, Ian M. Walton, Krista S. Walton, Darren P. Broom, Michael J. Benham, Humera Ansari, Ronny Pini, Camille Petit, Jürgen Adolphs, Andreas Schreiber, Toshihiro Shigeoka, Yuko Konishi, Kazuyuki Nakai, Matthias Henninger, Thomas Petrzik, Can Kececi, Vladimir Martis, Thomas Paschke, Enzo Mangano, Stefano Brandani
Abstract
Abstract This paper reports the results of an international interlaboratory study sponsored by the Versailles Project on Advanced Materials and Standards (VAMAS) and led by the National Institute of Standards and Technology (NIST) on the measurement of water vapor sorption isotherms at 25 °C on a pelletized nanoporous carbon (BAM-P109, a certified reference material). Thirteen laboratories participated in the study and contributed nine pure water vapor isotherms and four relative humidity isotherms, using nitrogen as the carrier gas. From these data, reference isotherms, along with the 95% uncertainty interval ( U k=2 ), were determined and are reported in a tabular format.