This paper presents an attractive method towards sensing and quantifying the concentration of dielectric particles suspended in a highly conductive medium. Fast electrical impedance spectroscopy (EIS) measurements were performed, based on an electrochemical setup and a non-parametric unbiased estimator. The impedance data are then mapped from the frequency domain to a time constant domain via the distribution of relaxation times (DRT) model. It is shown that application of DRT can systematically give a distribution function which is directly related with the concentration of micro-colloid samples. As a result, the samples were characterized by high sensitivity and resolution.
@article{arxiv.1903.07194,
title = {Sensing Micro-colloid Concentration by Spectral Impedance Measurements and Relaxation Times Analysis},
author = {Roberto G. Ramírez-Chavarría and Celia Sánchez-Pérez},
journal= {arXiv preprint arXiv:1903.07194},
year = {2019}
}