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Microfluidic device for compositional analysis of solvent systems at microwave frequencies

Rowe, David James, Porch, Adrian ORCID:, Barrow, David Anthony ORCID: and Allender, Christopher John 2012. Microfluidic device for compositional analysis of solvent systems at microwave frequencies. Sensors and Actuators B: Chemical 169 , pp. 213-221. 10.1016/j.snb.2012.04.069

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A device for analysing the chemical composition of single- and multi-phase solvent flows using microfluidic dielectric spectroscopy is demonstrated in this work. An open-circuited, half-wavelength, coaxial resonator operating at microwave frequencies (i.e. harmonics of 600 MHz) was embedded in a compression-sealed polytetrafluoroethylene microfluidic chip for in situ characterization of solvent–solvent and solute–solvent mixtures of varying concentration, and an aqueous–organic segmented flow. Results are shown for a solvent mixture of acetonitrile in toluene as a test system, exhibiting a sensitivity limit of 400 nM. In addition to being highly sensitive, the measurement system is fast, robust and non-invasive, and can be readily miniaturized.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: Dielectric measurements; Microwave sensors; Microfluidics
Publisher: Elsevier
ISSN: 0925-4005
Last Modified: 21 Oct 2022 09:31

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