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Quantitative analysis of molecular interaction in a microfluidic channel: the T-sensor
A E Kamholz1, B H Weigl, B A Finlayson
1Department of Bioengineering, University of Washington, Seattle 98195, USA. kamholz@u.washington.edu
Analytical Chemistry
|December 22, 1999
Summary
A new T-sensor measures analyte concentrations continuously using microfluidic diffusion and optical monitoring. This study presents a rapid method to determine unknown diffusion and reaction parameters for accurate T-sensor analysis.
Area of Science:
- Analytical Chemistry
- Microfluidics
- Chemical Sensing
Background:
- Microfluidic devices offer precise control over fluid dynamics.
- T-sensors utilize low Reynolds number flow for chemical analysis.
- Optical monitoring enables continuous measurement of interdiffusing streams.
Purpose of the Study:
- To present an analytical model for T-sensor behavior.
- To develop a rapid method for determining unknown kinetic and diffusion parameters.
- To enable accurate analyte concentration measurement in microfluidic systems.
Main Methods:
- Development of an analytical model based on diffusion coefficients and reaction kinetics.
- Interpretation of T-sensor experiments using the developed model.
- Optical measurement of fluorescence intensity for analyte quantification.
Main Results:
- The analytical model predicts T-sensor performance based on diffusion and reaction parameters.
- A rapid method was established to determine unknown parameters from experimental data.
- The approach allows for continuous monitoring of analyte concentrations.
Conclusions:
- The T-sensor is a viable tool for continuous chemical sensing.
- The presented method enhances the accuracy of T-sensor analysis by determining unknown parameters.
- This work advances microfluidic chemical measurement capabilities.