Paper-Based System for Ion Transfer Across the Liquid-Liquid Interface

Area of Science:

• Analytical Chemistry
• Electrochemistry
• Materials Science

Background:

• Ion transfer studies are crucial for electrochemistry, pharmacokinetics, and sensing.
• Traditional methods face challenges due to liquid-liquid interface instability, limiting solvent choices and portability.
• Existing setups are confined to laboratory settings.

Purpose of the Study:

• To develop a stable and portable substrate for ion transfer studies.
• To utilize paper as a platform for miniaturized analytical devices.
• To enable redox-driven anion transfer across liquid-liquid interfaces on paper.

Main Methods:

• Design of a three-phase electrode paper-based setup.
• Electrochemical measurements for anion transfer from aqueous to organic phases.
• Concentration dependence studies and analysis of anion mixtures.

Main Results:

• The paper-based setup demonstrated good agreement with traditional methods for seven different anions.
• Successful characterization of anion transfer across the liquid-liquid interface.
• Evaluation of the setup's applicability and limitations for analyzing anion mixtures.

Conclusions:

• Paper serves as an effective substrate for stable ion transfer studies.
• The proposed device offers a portable and accessible alternative to traditional setups.
• This approach expands the potential of paper-based devices in analytical chemistry and sensing.