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Título del libro: Sas 2019 - 2019 Ieee Sensors Applications Symposium, Conference Proceedings
Título del capítulo: Sensing Micro-colloid Concentration by Spectral Impedance Measurements and Relaxation Times Analysis

Autores UNAM:
ROBERTO GIOVANNI RAMIREZ CHAVARRIA; CELIA ANGELINA SANCHEZ PEREZ;
Autores externos:

Idioma:
Inglés
Año de publicación:
2019
Palabras clave:

Distribution functions; Electric impedance; Electric impedance measurement; Frequency domain analysis; Relaxation time; Spectroscopy; Colloid concentration; Conductive medium; Dielectric particles; Distribution of Relaxation Times; Electrical impedance spectroscopy; Impedance measurement; Impedance sensors; Unbiased estimator; Electrochemical impedance spectroscopy


Resumen:

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 with high sensitivity and resolution. © 2019 IEEE.


Entidades citadas de la UNAM: