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Light-emitting diodes for analytical chemistry.

Mirek Macka1, Tomasz Piasecki, Purnendu K Dasgupta

  • 1Australian Center for Research on Separation Science and School of Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia.

Annual Review of Analytical Chemistry (Palo Alto, Calif.)
|May 14, 2014
PubMed
Summary

Light-emitting diodes (LEDs) offer versatile applications in analytical chemistry, enhancing fluorescence lifetime measurements and optical detection systems. Future advancements, particularly in deep UV LEDs, promise expanded analytical capabilities.

Keywords:
absorbance detectioncapillary separationsfluorescence detectionmicrofluidic chipoptical methods of analysissensors

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Area of Science:

  • Analytical Chemistry
  • Optical Sensing
  • Spectroscopy

Background:

  • Light-emitting diodes (LEDs) are increasingly integral to analytical chemistry applications.
  • Their rapid switching capabilities enable advanced techniques like fluorescence lifetime measurement.
  • LEDs are utilized in photoreactors, microdevices, and optical detection systems.

Purpose of the Study:

  • To critically review recent literature on the use of LEDs in optical detection and measurement systems.
  • To explore the underutilized wavelength selectivity of LEDs as detectors.
  • To project future applications of LEDs in analytical chemistry.

Main Methods:

  • Literature review of recent scientific publications.
  • Analysis of LED applications in absorbance and fluorescence measurements.
  • Discussion of LED integration in microanalytical devices.

Main Results:

  • LEDs have demonstrated significant utility in various analytical chemistry roles.
  • Fast switching rates of LEDs facilitate precise fluorescence lifetime measurements.
  • Wavelength selectivity of LEDs as detectors remains an area for further exploitation.

Conclusions:

  • LEDs are versatile tools in analytical chemistry, impacting detection, conversion, and device fabrication.
  • Exploiting LED wavelength selectivity can enhance analytical performance.
  • The development of high-intensity deep UV LEDs is anticipated to broaden their future applications significantly.