Interlaboratory study of the operational stability of automated sorption balances.

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  • Samuel Zelinka
    US FOrest Service, Forest Products Laboratory, Madison Wisconsin
  • Samuel Glass
    US FOrest Service, Forest Products Laboratory, Madison Wisconsin
  • Eleanor Lazarcik
    US FOrest Service, Forest Products Laboratory, Madison Wisconsin
  • Emil Thybring
    University of Copenhagen
  • Michael Altgen
    Norwegian Insititute of Bioeconomy Research
  • Lauri Rautkari
    Aalto University
  • Simon Curling
  • Jinzhen Cao
    Beijing Forestry University
  • Yujiao Wang
    Beijing Forestry University
  • Tina Kunniger
    EMPA, Dubendorf
  • Gustav Nystrom
    EMPA, Dubendorf
  • Christopher Hubert Dreimol
    EMPA, Dubendorf
  • Ingo Burgert
    EMPA, Dubendorf
  • Mohd Khairhun Anwar Uyup
    Forest Research Institute Malaysia, Selangor
  • Tumirah Khadiran
    Forest Research Institute Malaysia, Selangor
  • Mark Roper
    Hiden Isochema Ltd, Warrington
  • Darren Broom
    Hiden Isochema Ltd, Warrington
  • Matthew Schwarzkopf
    InnoRenew CoE, Slovenia
  • Arief Yudhanto
    King Abdullah University of Science and Technology (KAUST)
  • Mohammad Subah
    King Abdullah University of Science and Technology (KAUST)
  • Gilles Lubineau
    King Abdullah University of Science and Technology (KAUST)
  • Maria Fredriksson
    Lund University
  • Marcin Strojecki
    Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences
  • Wieslaw Olek
    University of Life Sciences, Poznan
  • Jerzy Majka
    University of Life Sciences, Poznan
  • Nanna Bjerregaard Pedersen
    Institute for Conservation, Royal Danish Academy, Copenhagen
  • Daniel Burnett
    Surface Measurement Systems Ltd
  • Armando Garcia
    Surface Measurement Systems Ltd
  • Els Verdonck
    TA instruments
  • Frieder Dreisbach
    TA instruments
  • Louis Waguespack
    TA instruments - Waters LLC
  • Jennifer Schott
    TA instruments - Waters LLC
  • Luis Esteban
    Universidad Politechnica de Madrid
  • Alberto Garcia-Iruela
    Universidad Politechnica de Madrid
  • Thibaut Colinart
    Universitie Bretagne Sud
  • Romain Remond
    Universitie de Lorraine
  • Brahim Mazian
    Universitie Paris-Saclay
  • Patrick Perre
    Universitie Paris-Saclay
  • Lukas Emmerich
    University of Gottingen
  • Li Ling
    University of Maine
Automated sorption balances are widely used for characterizing the interaction of water vapor with hygroscopic materials. These instruments provide an efficient way to collect sorption isotherm data and kinetic data. A typical method for defining equilibrium after a step change in relative humidity (RH) is using a particular threshold value for the rate of change in mass with time. Recent studies indicate that commonly used threshold values yield substantial errors and that further measurements are needed at extended hold times as a basis to assess the accuracy of abbreviated equilibration criteria. However, the mass measurement accuracy at extended times depends on the operational stability of the instrument. Published data on the stability of automated sorption balances are rare. An interlaboratory study was undertaken to investigate equilibration criteria for automated sorption balances. This paper focuses on the mass, temperature, and RH stability and includes data from 25 laboratories throughout the world. An initial target for instrument mass stability was met on the first attempt in many cases, but several instruments were found to have unexpectedly large instabilities. The sources of these instabilities were investigated and greatly reduced. This paper highlights the importance of verifying operational mass stability of automated sorption balances, gives a method to perform stability checks, and provides guidance on identifying and correcting common sources of mass instability.
Original languageEnglish
Pages (from-to)1663-1674
Number of pages12
JournalAdsorption
Volume30
Issue number7
Early online date13 Apr 2024
DOIs
Publication statusPublished - 1 Oct 2024
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