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Performance of in-line microfluidic mixers in laminar flow for high-throughput flow cytometry
W Coyt Jackson1, T A Bennett, B S Edwards
1University of New Mexico, College of Engineering, Albuquerque 87131, USA.
Biotechniques
|July 26, 2002
Summary
This study presents a novel micromixing method compatible with autosamplers and flow cytometry. It efficiently mixes samples using a magnetic microstirrer for high-throughput analysis in submicroliter volumes.
Area of Science:
- Biotechnology
- Analytical Chemistry
- Microfluidics
Background:
- Laminar flow systems require efficient mixing for accurate analysis.
- Traditional mixing methods can be slow and incompatible with high-throughput workflows.
Purpose of the Study:
- To develop a micromixing approach compatible with commercial autosamplers and flow cytometry.
- To integrate submicroliter sample handling with efficient mixing for high-throughput analysis.
Main Methods:
- Utilized a high-throughput flow cytometry (HyperCyt) setup with air bubble-separated samples.
- Employed a magnetic microstirrer within the sample line for mixing cells/particles with reagents.
- Assessed mixing efficiency using fluorescence-based cell calcium responses and bead unquenching.
Main Results:
- Demonstrated efficient mixing of continuous and discrete sample streams.
- Identified a "bar" mixer as more efficient than a "wire" mixer, dependent on spinning action.
- Validated the approach for submicroliter volumes in flow cytometry and microfluidic channels.
Conclusions:
- The developed micromixing technique is effective for high-throughput analysis.
- This method enhances compatibility between autosamplers, flow cytometry, and microfluidic devices.
- Offers a robust solution for mixing in low-volume, continuous flow systems.