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Scientific article
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English

Paper-supported thin-layer ion transfer voltammetry for ion detection

Published inSensors and Actuators. B, Chemical, vol. 280, p. 69-76
Publication date2019
Abstract

We report here on paper-supported thin sample layer voltammetry for the determination of ions. To achieve this goal, a simple setup for the coupling of a commercially available electrode to a silver rod electrode was designed and evaluated for paper-supported thin-layer voltammetry. Linear scan ion transfer voltammetry was explored here for ion-selective membranes doped with an ionophore. The ion-transfer processes and electrochemical behaviors of the system are here evaluated and confirmed by numerical simulation. In the proof-of-concept experiments described, the ions tetrabutylammonium chloride (TBA+) and potassium (K+) were studied as model analytes at membranes without and with ionophore, respectively. A linear relationship from 0.1mM to 1.0mM K+ was obtained between the charge and ion concentration. The coexistence of background sodium ions did not give appreciable interference, but the background wave was not completely isolated from the analyte wave, as also confirmed by the model. The methodology was successfully demonstrated for determination of K+ in mineral water. It is anticipated that this paper-supported thin-layer detection approach may provide an attractive readout protocol for disposable paper-based analytical devices as the methodology does not place strict demands on reference electrode performance.

Keywords
  • Ion transfer voltammetry
  • Thin-layer
  • Paper-supported
  • Ion detection
Research group
Citation (ISO format)
DING, Jiawang et al. Paper-supported thin-layer ion transfer voltammetry for ion detection. In: Sensors and Actuators. B, Chemical, 2019, vol. 280, p. 69–76. doi: 10.1016/j.snb.2018.10.046
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ISSN of the journal0925-4005
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Technical informations

Creation10/23/2018 2:12:00 PM
First validation10/23/2018 2:12:00 PM
Update time03/15/2023 8:52:11 AM
Status update03/15/2023 8:52:11 AM
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