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Vol. 34, No. 8(3), S&M3042

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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

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Sensors and Materials, Volume 28, Number 12 (2016)
Copyright(C) MYU K.K.
pp. 1329-1335
S&M1294 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2016.1451
Published: December 14, 2016

Effects of Electrode Placement and Measurement Time on Electrochemical Signal of Redox Species Flowing through Porous Material [PDF]

Wataru Iwasaki, Ramachandra Rao Sathuluri, Ryoji Kurita, Osamu Niwa, and Masaya Miyazaki

(Received August 19, 2016; Accepted November 25, 2016)

Keywords: electrochemical measurement, immunochromatography, paper-based analytical device, pointof- care testing

We have studied the construction of an electrochemical immunochromatography platform as one of the point-of-care testing devices from both experimental and theoretical aspects. In the electrochemical immunochromatography measurement, the layout of working, reference, and counter electrodes and the flow rate in a porous membrane are important in obtaining a highly sensitive and stable electrochemical signal. In this manuscript, we report the effects of the layout of the three electrodes and the elapsed time after sample injection on electrochemical signals. We found that the working electrode should be placed upstream of the reference electrode because an unfavorable electrochemical signal from a Ag+ ion from the reference electrode was observed on the working electrode when it was located downstream of the reference electrode. Furthermore, we found that the electrochemical signal was inversely proportional to the sixth root of time. Experimental and theoretical results are consistent with each other, exhibiting a high correlation coefficient of 0.99.

Corresponding author: Wataru Iwasaki


Cite this article
Wataru Iwasaki, Ramachandra Rao Sathuluri, Ryoji Kurita, Osamu Niwa, and Masaya Miyazaki, Effects of Electrode Placement and Measurement Time on Electrochemical Signal of Redox Species Flowing through Porous Material, Sens. Mater., Vol. 28, No. 12, 2016, p. 1329-1335.



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