<div class="csl-bib-body">
<div class="csl-entry">Lendl, B., Dabrowska, A., & Schwaighofer, A. (2022, October 5). <i>QCL Based Mid-IR Dispersion Spectroscopy of Liquids</i> [Conference Presentation]. SciX 2022, Covington, United States of America (the).</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/154012
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dc.description
QCL BASED MID-IR DISPERSION SPECTROSCOPY OF LIQUIDS
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dc.description.abstract
Mid-IR dispersion spectroscopy is an attractive, novel approach to liquid phase analysis that extends the possibilities of traditional methods based on the detection of absorption via intensity attenuation. This technique detects inherent refractive index changes (phase shifts) induced by IR absorption. In contrast to classic absorption spectroscopy, it provides extended dynamic range, baseline-free detection, constant sensitivity, and inherent immunity to power fluctuation. In this talk, a detailed experimental and theoretical characterization and verification of this method with special focus on broadband liquid sample analysis will be provided. For this purpose, we use the latest generation, compact benchtop dispersion spectroscopy setup based on an EC-QCL coupled to a Mach-Zehnder interferometer. Phase-locked interferometric detection enables to fully harness the advantages of the technique. By instrument operation in the quadrature point combined with balanced detection, the full immunity towards laser source power fluctuations and the environmental noise can be achieved. On the example of ethanol (0.5-50% v/v) dissolved in water, it is experimentally demonstrated that changes of the refractive index function are linearly related to concentration for strongly absorbing, highly concentrated samples beyond the validity of the Beer-Lambert’s law. Characterization of the sensitivity and noise behavior indicates that the optimum applicable pathlength for liquid analysis can be extended beyond the ones applicable for absorption spectroscopy. Experimental demonstration of the advantages over classical absorption spectroscopy illuminates the potential of dispersion spectroscopy as upcoming robust and sensitive analytical method.
en
dc.description.sponsorship
FFG - Österr. Forschungsförderungs- gesellschaft mbH
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dc.language.iso
en
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dc.subject
Mid-IR spectroscopy
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dc.subject
EC-QCL
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dc.subject
Spectroscopy
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dc.title
QCL Based Mid-IR Dispersion Spectroscopy of Liquids
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dc.type
Presentation
en
dc.type
Vortrag
de
dc.relation.grantno
868615
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dc.type.category
Conference Presentation
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tuw.publication.invited
invited
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tuw.project.title
Chemical Systems Engineering
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tuw.researchTopic.id
M2
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tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.value
100
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tuw.publication.orgunit
E164-02-1 - Forschungsgruppe Prozessanalytik
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tuw.author.orcid
0000-0003-3838-5842
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tuw.author.orcid
0000-0002-3074-5674
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tuw.author.orcid
0000-0003-2714-7056
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tuw.event.name
SciX 2022
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tuw.event.startdate
02-10-2022
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tuw.event.enddate
07-10-2022
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tuw.event.online
On Site
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tuw.event.type
Event for scientific audience
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tuw.event.place
Covington
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tuw.event.country
US
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tuw.event.presenter
Lendl, Bernhard
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tuw.event.track
Multi Track
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wb.sciencebranch
Chemie
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wb.sciencebranch.oefos
1040
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wb.sciencebranch.value
100
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item.grantfulltext
none
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item.openairecristype
http://purl.org/coar/resource_type/c_18cp
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item.openairetype
conference paper not in proceedings
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item.languageiso639-1
en
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item.cerifentitytype
Publications
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item.fulltext
no Fulltext
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crisitem.author.dept
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
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crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
-
crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
-
crisitem.author.orcid
0000-0003-3838-5842
-
crisitem.author.orcid
0000-0002-3074-5674
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crisitem.author.orcid
0000-0003-2714-7056
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crisitem.author.parentorg
E164 - Institut für Chemische Technologien und Analytik
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crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
-
crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
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crisitem.project.funder
FFG - Österr. Forschungsförderungs- gesellschaft mbH
