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Pneumatically Driven Microfluidic Platform for Micro-Particle Concentration

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Published on: February 1, 2022

Automated liquid-liquid extraction by pneumatic recirculation on a centrifugal microfluidic platform.

Alexei Kazarine¹, Matthew C R Kong, Erin J Templeton

¹Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, Canada H3A 0B8.

Analytical Chemistry

|August 1, 2012

Summary

This study demonstrates automated liquid-liquid extraction on a microfluidic device using pneumatic pumping. The novel technique achieves efficient extraction cycles in just 50 seconds, overcoming limitations of conventional systems.

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Published on: November 23, 2015

Area of Science:

Analytical Chemistry
Microfluidics
Chemical Engineering

Background:

Liquid-liquid extraction (LLE) is crucial for sample preparation.
Conventional LLE methods can be time-consuming and require large sample volumes.
Microfluidic devices offer miniaturization and automation potential for LLE.

Purpose of the Study:

To develop and demonstrate a novel automated liquid-liquid extraction technique on a centrifugal microfluidic device.
To utilize non-contact pneumatic pumping for efficient liquid recirculation.
To assess the performance and feasibility of the automated LLE process.

Main Methods:

A centrifugal microfluidic device was employed for the LLE process.
Non-contact pneumatic pumping was used for liquid recirculation.
Aqueous iodine in potassium iodide solution and hexadecane were used as model analytes and solvent.
The process involved multi-cycle extraction following automated sample introduction.

Main Results:

The automated LLE process was successfully implemented on the microfluidic device.
Each extraction cycle was completed in a rapid 50 seconds.
A pumping rate of 120 ± 10 μL/min was achieved during liquid recirculation.
The technique required minimal device space.

Conclusions:

Pneumatic liquid recirculation on a centrifugal microfluidic device enables efficient, automated LLE.
This method offers advantages over conventional LLE systems, particularly in terms of speed and automation.
The demonstrated technique is a significant advancement for microfluidic-based sample preparation.