Open AccessInvestigation to Minimize Electrochemical Impedance Spectroscopy Drift
Author(s) -
Emily Ziino,
Sabrina Marnoto,
Jeffrey Mark Halpern
Publication year - 2020
Publication title -
ecs transactions
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.235
H-Index - 52
eISSN - 1938-6737
pISSN - 1938-5862
DOI - 10.1149/09707.0737ecst
Subject(s) - dielectric spectroscopy , electrical impedance , electrode , materials science , reproducibility , analytical chemistry (journal) , electrochemistry , chemistry , electrical engineering , engineering , chromatography
Electrochemical impedance spectroscopy (EIS) is a technique used to characterize physiochemical processes, especially in the field of biosensors. However, EIS has been known to have reproducibility issues due to an inherent drift. When taking repeated measurements of the same exact solution using EIS, impedance measurements have an increasing trend which can be detailed by a linear slope. The reported EIS drift ranges from 0.11 to 5.5 Ω/min. We studied the drift to assist with future data interpretation and model fitting. We discovered the cleanliness and treatment of the working electrode effects EIS drift, and the minimization of the drift can occur by rinsing the working electrode in-between repeated runs.