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Interlaboratory study of the operational stability of automated sorption balances

Zelinka, Samuel L. ; Glass, Samuel V. ; Lazarcik, Eleanor Q.D. ; Thybring, Emil E. ; Altgen, Michael ; Rautkari, Lauri ; Curling, Simon ; Cao, Jinzhen ; Wang, Yujiao and Künniger, Tina , et al. (2024) In Adsorption
Abstract

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... (More)

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.

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organization
publishing date
type
Contribution to journal
publication status
in press
subject
keywords
Interlaboratory investigation, Measurement uncertainty, Water vapor sorption
in
Adsorption
publisher
Springer
external identifiers
  • scopus:85190371215
ISSN
0929-5607
DOI
10.1007/s10450-024-00472-9
language
English
LU publication?
yes
id
9e90f614-ba50-48b4-81d1-11f7e58c2d9b
date added to LUP
2024-05-20 11:50:26
date last changed
2024-05-20 11:51:48
@article{9e90f614-ba50-48b4-81d1-11f7e58c2d9b,
  abstract     = {{<p>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.</p>}},
  author       = {{Zelinka, Samuel L. and Glass, Samuel V. and Lazarcik, Eleanor Q.D. and Thybring, Emil E. and Altgen, Michael and Rautkari, Lauri and Curling, Simon and Cao, Jinzhen and Wang, Yujiao and Künniger, Tina and Nyström, Gustav and Dreimol, Christopher Hubert and Burgert, Ingo and Uyup, Mohd Khairun Anwar and Khadiran, Tumirah and Roper, Mark G. and Broom, Darren P. and Schwarzkopf, Matthew and Yudhanto, Arief and Subah, Mohammad and Lubineau, Gilles and Fredriksson, Maria and Strojecki, Marcin and Olek, Wiesław and Majka, Jerzy and Pedersen, Nanna Bjerregaard and Burnett, Daniel J. and Garcia, Armando R. and Verdonck, Els and Dreisbach, Frieder and Waguespack, Louis and Schott, Jennifer and Esteban, Luis G. and Garcia-Iruela, Alberto and Colinart, Thibaut and Rémond, Romain and Mazian, Brahim and Perre, Patrick and Emmerich, Lukas and Li, Ling}},
  issn         = {{0929-5607}},
  keywords     = {{Interlaboratory investigation; Measurement uncertainty; Water vapor sorption}},
  language     = {{eng}},
  publisher    = {{Springer}},
  series       = {{Adsorption}},
  title        = {{Interlaboratory study of the operational stability of automated sorption balances}},
  url          = {{http://dx.doi.org/10.1007/s10450-024-00472-9}},
  doi          = {{10.1007/s10450-024-00472-9}},
  year         = {{2024}},
}