abs

학술발표회초록보기

Inquiry on Abstract abstract@kcsnet.or.kr

Inquiry on Payment member@kcsnet.or.kr

현재 가능한 작업은 아래와 같습니다.
  • 09월 11일 00시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

124th General Meeting of Korean Chemical Society Coulometric ion-sensor

Submission Date :
9 / 27 / 2019 , 13 : 32 : 33
Abstract Number :
124092732226
Presenting Type:
Symposium
Presenting Area :
Analytical Chemistry - [KCS-JAIMA Joint Symposium] Analytical Chemistry with JAIMA: Biosensor Development
Authors :
Yumi Yoshida
Molecular Chemistry and Engineering, Kyoto Institute of Technology, Japan
※ You will get a confirmation e-mail on approval or disapproval of the author's
overseas affiliation in a few days.
Approved : 1 case
Assigned Code :
ANAL1-4 Assigend Code Guideline
Presenting Time :
THU, 15 : 40

Most of the ion sensors are a potentiometric device of a two-electrode system. The potentiometric device has disadvantages of potential drift and low reproducibility, and the calibration procedure is often required before the measurement. However, calibration is not suitable for point of care testing with a handy device by a non-expert person such as a customer. In the present work, we developed the thin layer electrolysis cell for the ion transfer at the liquid-liquid interface and applied it to the coulometric determination of a redox-inert ion, which works as a calibration-free ion sensor[1-4]. The thin layer electrolysis cell is a two-electrode system and has a laminate structure composed of the conducting polymer-coated electrode (CP-E), the organic thin layer membrane of 2-nitrophenyl octyl ether (NPOE, thickness of 30 μm), the aqueous thin layer solution (W, thickness of 50 μm) and an Ag/AgCl electrode (Figure 1 ).
We applied the thin layer electrolysis cell to the flow injection analysis of the redox-inert ion (Figure 1). The electrical charge of the current peak was converted to the mole amount through Faraday’s low. In the concentration range of 5-100 μM, the electrolysis efficiency, ε%, was close to 100%, which means that the flow injection analysis in the range realizes coulometric determination (calibration-free).


Reference
1. Y. Yoshida, S. Yamaguchi, K. Maeda, “Conducting polymer-coated electrode as a reference/counter electrode in an organic phase and its application to a two-electrode type thin-layer cell for voltammetry at the liquid | liquid interface”, Anal. Sci., 26, 137-139 (2010).
2. Y. Yoshida, S. Nakamura, J. Uchida, A. Hemmi and K. Maeda, “A flow electrolysis cell with a thin aqueous phase and a thin organic phase for the absolute determination of trace ionic species”, J. Electroanal. Chem., 707, 95-101, (2013).
3. Y. Yoshida, J. Uchida, S. Nakamura, S. Yamaguchi and K. Maeda, Analytical Sciences, Improved Thin-layer Electrolysis Cell for Ion Transfer at the Liquid|Liquid Interface Using a Conducting Polymer-coated Electrode, Anal. Sci., 30(3), 351-357 (2014).
4. E. Kusakabe, Y. Nakamura, K. Maeda, M. Fukuyama, Y. Yoshida, “Effect of oxidation ratio of conducting polymer on potential stability of the conducting polymer-coated electrode in voltammetric cell for the ion transfer”, J. Electroanal. Chem., 825, 8-15 (2018)