Interlaboratory study of the operational stability of automated sorption balances.
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In: Adsorption, Vol. 30, No. 7, 01.10.2024, p. 1663-1674.
Research output: Contribution to journal › Article › peer-review
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T1 - Interlaboratory study of the operational stability of automated sorption balances.
AU - Zelinka, Samuel
AU - Glass, Samuel
AU - Lazarcik, Eleanor
AU - Thybring, Emil
AU - Altgen, Michael
AU - Rautkari, Lauri
AU - Curling, Simon
AU - Cao, Jinzhen
AU - Wang, Yujiao
AU - Kunniger, Tina
AU - Nystrom, Gustav
AU - Dreimol, Christopher Hubert
AU - Burgert, Ingo
AU - Uyup, Mohd Khairhun Anwar
AU - Khadiran, Tumirah
AU - Roper, Mark
AU - Broom, Darren
AU - Schwarzkopf, Matthew
AU - Yudhanto, Arief
AU - Subah, Mohammad
AU - Lubineau, Gilles
AU - Fredriksson, Maria
AU - Strojecki, Marcin
AU - Olek, Wieslaw
AU - Majka, Jerzy
AU - Pedersen, Nanna Bjerregaard
AU - Burnett, Daniel
AU - Garcia, Armando
AU - Verdonck, Els
AU - Dreisbach, Frieder
AU - Waguespack, Louis
AU - Schott, Jennifer
AU - Esteban, Luis
AU - Garcia-Iruela, Alberto
AU - Colinart, Thibaut
AU - Remond, Romain
AU - Mazian, Brahim
AU - Perre, Patrick
AU - Emmerich, Lukas
AU - Ling, Li
PY - 2024/10/1
Y1 - 2024/10/1
N2 - 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.
AB - 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.
U2 - 10.1007/s10450-024-00472-9
DO - 10.1007/s10450-024-00472-9
M3 - Article
VL - 30
SP - 1663
EP - 1674
JO - Adsorption
JF - Adsorption
SN - 1572-8757
IS - 7
ER -