Considerations on electrical impedance measurements of electrolyte solutions in a four-electrode cell

3rd International Meeting for Researchers in Materials and Plasma Technology; 1st Symposium on Nanoscience and Nanotechnology

物理学;材料科学

Chaparro, C.V.^1 ; Herrera, L.V.^1 ; Meléndez, A.M.^1 ; Miranda, D.A.^1

Universidad Industrial de Santander, Bucaramanga, Colombia^1

关键词: Depolarization effects;    Electrical impedance measurement;    Electrical impedance spectroscopy;    Electrical measurement;    Electrolyte solutions;    Phosphate buffer salines;    Surface chemical state;    Van der Pauw method;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/687/1/012101/pdf
DOI  :  10.1088/1742-6596/687/1/012101

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A tetrapolar probe to measure the electrical properties of electrolyte solutions was implemented with gold electrodes according to the van der Pauw method. Electrical impedance spectroscopy (EIS) measurements of different concentrations of phosphate buffer saline (PBS) solution and an oral mucosal tissue sample dispersed in PBS were performed in the galvanostatic mode using a four-electrode cell (tetrapolar probe). Taking advantage of using a potentiostat/galvanostat for carrying out the electrical measurements, a simple and rapid method using a three-electrode electrochemical cell is described for: a) cleaning of electrodes, b) verification of surface chemical state of electrode material and c) choice of current supplied to electrodes for EIS measurements. Results of this research shown a depolarization effect due to the addition of oral mucosa tissue cells into the PBS solution.