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Moisture in Solids: Comparison Between Evolved Water Vapor and Vaporization Coulometric Karl Fischer Methods

Abstract : Moisture content can affect the thermo-physical properties of many materials. Thus sufficient knowledge of this parameter is required to improve product shelf life and quality, reduce waste or enhance process efficiency. The traditional loss on drying methods are still the go-to methods due to their robustness and simplicity. How-ever, their inherent lack of selectivity imposes restrictions. These are overcome with newer techniques such as vaporization coulometric Karl Fischer titration (vap-C-KFT) and evolved water vapor analysis (EWV). The former is a well-established method, but the latter was more recently introduced and the literature available on it is scarce. This work aims to bridge this gap in knowledge and demonstrate the com-parability of the EWV to the more established vap-C-KFT. Multiple samples were studied and the data are analyzed along the principles reported recently by INRiM with a few modifications.
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Submitted on : Wednesday, May 12, 2021 - 8:20:41 AM
Last modification on : Wednesday, November 3, 2021 - 4:05:24 AM

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Rudolf Aro, Mohamed Wajdi Ben Ayoub, Ivo Leito, Éric Georgin. Moisture in Solids: Comparison Between Evolved Water Vapor and Vaporization Coulometric Karl Fischer Methods. International Journal of Thermophysics, Springer Verlag, 2020, 41 (8), ⟨10.1007/s10765-020-02697-6⟩. ⟨hal-03224870⟩

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