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A multi-source portable light emitting diode spectrofluorometer.

Safwan Obeidat1, Baolong Bai, Gary D Rayson

  • 1Box 30001 MSC 3C, Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003-0001, USA.

Applied Spectroscopy
|March 15, 2008
PubMed
Summary
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A new portable spectrofluorometer uses LED light sources for analysis. This lightweight instrument effectively analyzes complex samples like plant and animal feed extracts.

Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Instrumentation

Background:

  • Traditional spectrofluorometers can be bulky and expensive.
  • Portable analytical instruments are needed for field applications.

Purpose of the Study:

  • To develop and evaluate a portable luminescence spectrofluorometer.
  • To assess its capability for analyzing complex mixtures and biological samples.

Main Methods:

  • Utilized multiple light-emitting diodes (LEDs) as excitation sources.
  • Generated excitation-emission matrices (EEMs) for spectral analysis.
  • Applied multi-way principal component analysis (MPCA) for data interpretation.

Main Results:

  • Achieved low limits of detection for common fluorophores (rhodamine 6G, rhodamine B, fluorescein).

Related Experiment Videos

  • Successfully analyzed mixtures of rhodamine B and fluorescein.
  • Differentiated between various plant and animal feed extracts using MPCA.

    • Conclusions:

    • The developed portable spectrofluorometer is a viable tool for analyzing complex samples.
    • Its lightweight design and LED excitation offer advantages for field-based analysis.
    • MPCA is effective for discerning sample constituents from EEM data.