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Interlaboratory study of automated sorption measurements in wood: method for correcting systematic errors with the commonly used 0.002% min−1 stop criterion

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dc.abstract.enMany studies that use an automated sorption balance to determine a water vapor sorption isotherm for wood collect data until the moisture content change is less than or equal to 0.002% min−1 (20 µg g−1 min−1). This stop criterion has been claimed to give errors in equilibrium moisture content (EMC) predictions of less than 0.001 g g−1 but over the past 10 years, studies have shown that the actual errors can be greater than 0.01 g g−1 because the measurements are stopped well before equilibrium is reached. Despite the large errors associated with this stop criterion, it remains popular due to the speed at which isotherms can be measured. This paper utilizes data from a worldwide interlaboratory study on automated sorption balances to develop a correction method for estimating EMC of western larch (Larix occidentalis Nutt.) from the moisture content corresponding to the 20 µg g−1 min−1 criterion. The study uses data from 72 relative humidity absorption steps with hold times of 7–10 days from 21 different laboratories and eight different instrument models. EMC is defined based on the inherent mass stability of automated sorption balances determined in the first part of this interlaboratory study. On average the sorption process is less than 80% complete when the 20 µg g−1 min−1 criterion is reached, resulting in a mean absolute error (MAE) of 0.006 g g−1. The correction equation for estimating EMC reduces the MAE to 0.001 g g−1. The analysis presented in this paper, along with the correction equation, can be considered for certain use cases to reduce systematic errors and shorten measurement times.
dc.affiliationWydział Leśny i Technologii Drewna
dc.affiliation.instituteKatedra Nauki o Drewnie i Techniki Cieplnej
dc.contributor.authorZelinka, Samuel L.
dc.contributor.authorGlass, Samuel V.
dc.contributor.authorFarkas, Natalia
dc.contributor.authorThybring, Emil E.
dc.contributor.authorAltgen, Michael
dc.contributor.authorRautkari, Lauri
dc.contributor.authorCurling, Simon
dc.contributor.authorCao, Jinzhen
dc.contributor.authorWang, Yujiao
dc.contributor.authorKünniger, Tina
dc.contributor.authorNyström, Gustav
dc.contributor.authorDreimol, Christopher Hubert
dc.contributor.authorBurgert, Ingo
dc.contributor.authorRoper, Mark G.
dc.contributor.authorBroom, Darren P.
dc.contributor.authorSchwarzkopf, Matthew
dc.contributor.authorYudhanto, Arief
dc.contributor.authorSubah, Mohammad
dc.contributor.authorLubineau, Gilles
dc.contributor.authorFredriksson, Maria
dc.contributor.authorOlek, Wiesław
dc.contributor.authorMajka, Jerzy
dc.contributor.authorPedersen, Nanna Bjerregaard
dc.contributor.authorBurnett, Daniel J.
dc.contributor.authorGarcia, Armando R.
dc.contributor.authorDreisbach, Frieder
dc.contributor.authorWaguespack, Louis
dc.contributor.authorSchott, Jennifer
dc.contributor.authorEsteban, Luis G.
dc.contributor.authorGarcía‑Iruela, Alberto
dc.contributor.authorColinart, Thibaut
dc.contributor.authorRémond, Romain
dc.contributor.authorMazian, Brahim
dc.contributor.authorPerré, Patrick
dc.contributor.authorEmmerich, Lukas
dc.date.access2025-10-10
dc.date.accessioned2025-10-10T09:16:40Z
dc.date.available2025-10-10T09:16:40Z
dc.date.copyright2025-10-04
dc.date.issued2025
dc.description.abstract<jats:title>Abstract</jats:title> <jats:p>Many studies that use an automated sorption balance to determine a water vapor sorption isotherm for wood collect data until the moisture content change is less than or equal to 0.002% min<jats:sup>−1</jats:sup> (20 µg g<jats:sup>−1</jats:sup> min<jats:sup>−1</jats:sup>). This stop criterion has been claimed to give errors in equilibrium moisture content (EMC) predictions of less than 0.001 g g<jats:sup>−1</jats:sup> but over the past 10 years, studies have shown that the actual errors can be greater than 0.01 g g<jats:sup>−1</jats:sup> because the measurements are stopped well before equilibrium is reached. Despite the large errors associated with this stop criterion, it remains popular due to the speed at which isotherms can be measured. This paper utilizes data from a worldwide interlaboratory study on automated sorption balances to develop a correction method for estimating EMC of western larch (<jats:italic>Larix occidentalis</jats:italic> Nutt.) from the moisture content corresponding to the 20 µg g<jats:sup>−1</jats:sup> min<jats:sup>−1</jats:sup> criterion. The study uses data from 72 relative humidity absorption steps with hold times of 7–10 days from 21 different laboratories and eight different instrument models. EMC is defined based on the inherent mass stability of automated sorption balances determined in the first part of this interlaboratory study. On average the sorption process is less than 80% complete when the 20 µg g<jats:sup>−1</jats:sup> min<jats:sup>−1</jats:sup> criterion is reached, resulting in a mean absolute error (MAE) of 0.006 g g<jats:sup>−1</jats:sup>. The correction equation for estimating EMC reduces the MAE to 0.001 g g<jats:sup>−1</jats:sup>. The analysis presented in this paper, along with the correction equation, can be considered for certain use cases to reduce systematic errors and shorten measurement times.</jats:p>
dc.description.accesstimeat_publication
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_nocost
dc.description.financecost0,00
dc.description.if3,1
dc.description.number7
dc.description.points70
dc.description.versionfinal_published
dc.description.volume31
dc.identifier.doi10.1007/s10450-025-00655-y
dc.identifier.eissn1572-8757
dc.identifier.issn0929-5607
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/5366
dc.identifier.weblinkhttps://link.springer.com/article/10.1007/s10450-025-00655-y
dc.languageen
dc.pbn.affiliationforestry
dc.relation.ispartofAdsorption
dc.relation.pagesart. 99
dc.rightsCC-BY
dc.sciencecloudnosend
dc.share.typeOTHER
dc.subject.enwater vapor sorption
dc.subject.endynamic vapor sorption
dc.subject.ensorption isotherm
dc.subject.eninterlaboratory study
dc.subject.enequilibrium moisture content
dc.titleInterlaboratory study of automated sorption measurements in wood: method for correcting systematic errors with the commonly used 0.002% min−1 stop criterion
dc.typeJournalArticle
dspace.entity.typePublication
oaire.citation.issue7
oaire.citation.volume31