Huong Giang T Nguyen, David Newton, Riaz Ahmad, Carsten Prinz, Mario Zorrilla-Valtierra, Krista S Walton, Killian Gmyrek, Ronny Pini, Camille Petit, Marcus Lange, Jens Mӧllmer, Evelyn Fuhrmann, Katharina Volz, Garrett Taggart, Andreas Schreiber, Yuko Konishi, Kazuyuki Nakai, Christos Tampaxis, Theodore Steriotis, Hai Wang, Charles David Brewster, Mi Tian, Rajan Jagpal, Siyi Liu, George Neville, Sunanda Sain, Timothy Mays, Riccardo Rea, Enzo Mangano, Stefano Brandani, Maxwell Tsipoaka, Fateme Rezaei, Adrien Houzé, Nicolas Heymans, Guy De Weireld, Charles E Holland, Armin D Ebner, James A Ritter
UNLABELLED: 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 low-pressure CO2 adsorption isotherms at 25 °C on zeolite 13X (NIST research grade test material 10257). Eighteen laboratories participated in the study and contributed 21 datasets. From these data, a consensus reference isotherm, along with the 95% uncertainty interval (U k=2 ), were determined and reported. Results indicate the material is suitable for development into NIST reference material, which will become the first zeolitic reference material in beaded form at NIST.
SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at https://doi.org/10.1007/s10450-026-00701-3.