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Method Development for Contactless Resonant Cavity Dielectric Spectroscopic Studies of Cellulosic Paper
05:40

Method Development for Contactless Resonant Cavity Dielectric Spectroscopic Studies of Cellulosic Paper

Published on: October 4, 2019

Simple, distance-based measurement for paper analytical devices.

David M Cate1, Wijitar Dungchai, Josephine C Cunningham

  • 1Department of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, USA.

Lab on a Chip
|May 10, 2013
PubMed
Summary

A new distance-based detection method simplifies paper-based analytical devices (PADs) for portable chemical sensing. This innovation eliminates the need for external instruments, making PADs more accessible for point-of-use applications.

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Biotechnology

Background:

  • Paper-based analytical devices (PADs) are cost-effective chemical sensors for on-site analysis.
  • Current PADs often require external instrumentation (e.g., cameras) for quantitative results.
  • There is a need for more portable and resource-efficient PAD detection methods.

Purpose of the Study:

  • To introduce a novel distance-based detection technique for PADs.
  • To enable quantitative PAD measurements without peripheral equipment.
  • To demonstrate the broad applicability of this new detection motif.

Main Methods:

  • Developed a detection strategy based on the distance of color development on PADs.
  • Applied the technique to measure glucose, nickel, and glutathione.
  • Utilized enzymatic reactions, metal complexation, and nanoparticle aggregation for detection chemistries.

Main Results:

  • Achieved quantitative agreement with certified standards across different sample matrices.
  • Demonstrated the utility of distance-based detection for glucose, nickel, and glutathione.
  • Validated the portability and reduced resource intensity of the new method.

Conclusions:

  • Distance-based detection is a viable and broadly applicable method for PADs.
  • This technique enhances the portability and reduces the cost of chemical sensing.
  • Presents a new class of inexpensive sensor technologies for point-of-use applications.