Porous layer flow injection analysis with potentiometric chloride detection

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Continuous flow analysis is crucial for high-throughput sample testing.
• Developing cost-effective and simple analytical systems remains a challenge.

Purpose of the Study:

• To develop a paper-based continuous flow system for potentiometric detection.
• To investigate the control of dispersion and flow rate in a paper-based device.
• To determine the analytical performance for chloride detection.

Main Methods:

• A porous paper stream was utilized for continuous flow, propelled by a downstream porous paper pump.
• Microliter sample droplets were injected onto the paper surface.
• Dispersion was controlled by adjusting the injection position.
• Potentiometric detection was employed for chloride ion analysis.

Main Results:

• A constant flow rate was achieved using the paper-based pump system.
• The system demonstrated effective control over sample dispersion.
• Potentiometric detection of chloride ions was successful over a wide concentration range (0.1 mM to 1M).
• The device achieved a throughput of 50 or more samples per hour.

Conclusions:

• The developed paper-based continuous flow system offers a simple, low-cost, and efficient platform for analytical measurements.
• This technology has potential for high-throughput analysis in various applications.
• The system demonstrates robust performance for potentiometric detection of chloride ions.