Enhancement of sensitivity of coulometric detection usng a one-electrode system

K. Ikemoto, K. Kojima, F. Sassa, M. Yokokawa, H. Suzuki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Coulometric analysis is effective in the analysis of an analyte in a liquid plug of a very small volume. However, in the conventional coulometric detection, it took time to collect analyte molecules dissolved in the solution. To solve this problem, we used a novel method to achieve significant enhancement of sensitivity by using a one-electrode system. As a model analyte, hydrogen peroxide was oxidized in a flow channel and silver was deposited simultaneously on another electrode in another flow channel. Coulometric detection of the deposited silver showed a step change of generated charge. As a result, measurement time was reduced significantly (less than 2 s), although conventional methods took more than 60 s to achieve the same sensitivity. This shorter measurement time also suppressed the influence of background noise, resulting in significant lowering of the detection limit.

Original languageEnglish
Title of host publication2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11
Pages1962-1965
Number of pages4
DOIs
Publication statusPublished - Sep 1 2011
Externally publishedYes
Event2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11 - Beijing, China
Duration: Jun 5 2011Jun 9 2011

Publication series

Name2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11

Other

Other2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11
CountryChina
CityBeijing
Period6/5/116/9/11

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All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Electrical and Electronic Engineering

Cite this

Ikemoto, K., Kojima, K., Sassa, F., Yokokawa, M., & Suzuki, H. (2011). Enhancement of sensitivity of coulometric detection usng a one-electrode system. In 2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11 (pp. 1962-1965). [5969242] (2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11). https://doi.org/10.1109/TRANSDUCERS.2011.5969242