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Printed low-cost microfluidic analytical devices based on a transparent substrate.

Shogo Fujisaki1, Hiroyuki Shibata, Kentaro Yamada

  • 1Department of Applied Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. citterio@applc.keio.ac.jp.

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|March 15, 2019
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Summary
This summary is machine-generated.

A novel microfluidic transparent film-based analytical device (μTFAD) was developed using printing technologies for pump-free, gravity-assisted iron ion (Fe2+) detection. This low-cost device offers sensitive and selective Fe2+ quantification comparable to traditional methods.

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Microfluidics

Background:

  • Microfluidic devices offer miniaturization and high throughput for chemical analysis.
  • Developing cost-effective and easy-to-fabricate microfluidic platforms is crucial for wider adoption.
  • Transparent film-based devices enable integrated optical detection methods.

Purpose of the Study:

  • To develop a novel microfluidic transparent film-based analytical device (μTFAD).
  • To demonstrate the μTFAD's capability for pump-free, gravity-assisted iron ion (Fe2+) detection.
  • To evaluate the analytical performance and selectivity of the developed μTFAD system.

Main Methods:

  • Fabrication of μTFADs using wax printing for microchannels and inkjet printing for reagent deposition.
  • Utilizing gravity-assisted flow for sample and reagent transport within the microfluidic device.
  • Employing absorbance spectroscopy at 756 nm for Fe2+ quantification using nitroso-PSAP colorimetric reagent.

Main Results:

  • Achieved a linear detection range of 0-200 μM for Fe2+.
  • Obtained a limit of detection (LOD) of 1.18 μM, comparable to 96-well microplate assays.
  • Demonstrated high selectivity for Fe2+ detection in the presence of interfering metal ions without masking agents.

Conclusions:

  • The developed μTFAD is a cost-effective, fully printed analytical device for Fe2+ detection.
  • The pump-free, gravity-assisted design simplifies operation and reduces fabrication complexity.
  • μTFADs show promise for sensitive, selective, and on-site chemical analysis applications.