Measuring solute concentration with terahertz time-domain spectroscopy in single and multiphase systems
Accepted version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Kölbel, J
Li, Qi
Threlfall, Terrence L
Zeitler, Jochen
Abstract
A versatile setup based on a microfluidics platform allows investigation of liquid samples at various temperatures with terahertz time-domain spectroscopy. The set up is applied to develop a novel method that performs temperature and concentration calibrations of liquid samples at terahertz frequencies. Other than measuring the concentration of pure liquid phase solutions, it enables the studies of local concentration of semi-crystalline systems. An equivalent solute concentration during crystallisation can be calculated from the extracted absorption at low frequencies. The MgSO4-water system is discussed as an example to illustrate the idea of this method.
Description
Keywords
3401 Analytical Chemistry, 32 Biomedical and Clinical Sciences, 34 Chemical Sciences, 40 Engineering, 3205 Medical Biochemistry and Metabolomics, 4004 Chemical Engineering
Journal Title
Analytical Chemistry
Conference Name
Journal ISSN
0003-2700
1520-6882
1520-6882
Volume Title
Publisher
American Chemical Society
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Sponsorship
EPSRC (EP/S023046/1)
Engineering and Physical Sciences Research Council (EP/L015889/1)
Engineering and Physical Sciences Research Council (EP/L015889/1)