Water activity measurement of NaCl/H2O mixtures via substrate-integrated hollow waveguide infrared spectroscopy with integrated microfluidics
| Autor: | Penisson, Christophe, Wilk, Andreas, Theisen, Johannes, Kokoric, Vjekoslav, Mizaikoff, Boris, Gabriel, Jean-Christophe P. |
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| Přispěvatelé: | Institut de Chimie Séparative de Marcoule (ICSM - UMR 5257), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institute of Analytical and Bioanalytical Chemistry, Ulm University, Universität Ulm - Ulm University [Ulm, Allemagne], CEA Grenoble (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), European Project: 320915,EC:FP7:ERC,ERC-2012-ADG_20120216,REE-CYCLE(2013), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Gabriel, Jean-Christophe, Rare Earth Element reCYCLing with Low harmful Emissions - REE-CYCLE - - EC:FP7:ERC2013-07-01 - 2018-06-30 - 320915 - VALID |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | TechConnect Briefs (2018), ISBN: 978-0-9975117-8-9 Nanotech 2018-The 20th annual Nanotech Conference Nanotech 2018-The 20th annual Nanotech Conference, May 2018, Anaheim, United States. pp.198-201 |
| Popis: | International audience; A microfluidic system combined with substrate-integrated hollow waveguide (iHWG) vapor phase infrared spectroscopy has been developed for evaluating the chemical activity of volatile compounds dissolved in complex fluids. Chemical activity is an important yet rarely exploited parameter in process analysis and control. The instrumental approach developed herein uniquely enables controlled evaporation/permeation from a sample solution into a hollow waveguide structure, and analyzing the partial pressures of volatile constituents. It was shown that the chemical activity may be deduced from partial pressure measurements at thermodynamic equilibrium conditions. The combined microfluidic-iHWG mid-infrared sensor system allows realizing such studies in absence of any perturbations provoked by sampling operations. In this study, the first water activity measurement made by a microfluidic-iHWG device is presented. For proof-of-concept purpose water-NaCl mixtures are investigated. |
| Databáze: | OpenAIRE |
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