Journal article
On the utility of dielectric spectroscopy techniques to identify compounds and estimate concentrations of binary mixtures
CD Abeyrathne, MN Halgamuge, PM Farrell, E Skafidas
IEEE Sensors Journal | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | Published : 2014
Abstract
An important question is whether it is possible to build a sensor to identify the constituents and estimate their volume fractions in a mixture. In this paper, frequency dependent permittivity measured from dielectric sensors was used to identify both chemical species and their volume fractions of binary mixtures. Our analysis using the data presented in the literature and on-chip coplanar waveguide measurements, in 1-30 GHz range, illustrates that complex permittivity measurements are sufficient to estimate the volume fractions when the constituents of the mixture are known. Changes in concentrations are required to identify the constituent chemicals of binary mixtures when the constituents..
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Funding Acknowledgements
This work was supported by the National ICT Australia Victoria Research Laboratory, The University of Melbourne, Parkville, Australia. The associate editor coordinating the review of this paper and approving it for publication was Dr. Richard T. Kouzes.