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An absorption spectrophotometer compatible paper-based thin-layer cuvette with an integrated pneumatic pump.

Kotaro Morita1, Honomi Koiso1, Reina Kudo1

  • 1Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Japan. kotaro@sci.toho-u.ac.jp.

Analytical Methods : Advancing Methods and Applications
|October 4, 2021
PubMed
Summary

Researchers developed a novel paper-based optical cuvette with an integrated pneumatic pump for simple aqueous sample introduction. This low-cost device enables accurate absorption spectroscopy measurements using conventional spectrophotometers.

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Area of Science:

  • Analytical Chemistry
  • Materials Science

Background:

  • Conventional cuvettes for absorption spectroscopy can be expensive and require precise handling.
  • Development of low-cost, disposable, and user-friendly analytical devices is crucial for point-of-care applications.

Purpose of the Study:

  • To design and fabricate a novel paper-based thin-layer optical cuvette integrated with a pneumatic pump.
  • To demonstrate the utility of this paper-based cuvette for absorption spectroscopic analysis of aqueous samples.

Main Methods:

  • Utilizing polypropylene paper patterned with an electronic cutting machine to create a sample reservoir, open-channel optical path, and pneumatic pump.
  • Sealing the patterned paper with transparent tape to form the cuvette walls and pump mechanism.
  • Employing finger-induced negative pressure for pneumatic pumping of aqueous samples into the optical path.

Main Results:

  • Successfully fabricated a functional paper-based optical cuvette with an integrated pneumatic pump.
  • Demonstrated compatibility with standard spectrophotometers for absorption measurements.
  • Quantified concentrations of various colored dyes in aqueous solutions with the paper-based cuvette.

Conclusions:

  • The paper-based optical cuvette offers a simple, low-cost, and effective platform for absorption spectroscopy.
  • The integrated pneumatic pump facilitates easy and controlled introduction of aqueous samples.
  • This technology holds potential for accessible and disposable spectroscopic analysis.