Advantages of Odd Random Phase Multisine Electrochemical Impedance Measurements

• Published in: Electroanalysis (New York, N.Y.) Vol. 21; no. 6; pp. 730 - 739
• Main Authors: Van Ingelgem, Yves, Tourwé, Els, Blajiev, Orlin, Pintelon, Rik, Hubin, Annick
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.03.2009; WILEY‐VCH Verlag
• Subjects: Corrosion; Measurement time; Multisine impedance spectroscopy; Noise analysis; Nonlinearities; Sensoring
• ISSN: 1040-0397; 1521-4109
• DOI: 10.1002/elan.200804471

Electrochemical impedance spectroscopy (EIS) is a powerful technique to study electrochemical processes and to perform screening tasks. Recently an integrated measuring and modeling methodology for EIS based on a multisine excitation signal was developed. A key issue in this methodology is the data analysis, allowing us to rapidly quantify the reliability of the measured data. In this paper, a comparison is made between classical single‐sine and the proposed multisine measurements on the same system. The fitting of the impedance data obtained by single‐or multisine excitation and using different weighting factors is also discussed. In addition to the advantages reported in earlier work, it is concluded that, of all investigated frequencies, the odd random phase multisine excitation yields the highest quality data in the shortest measurement time.