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Related Experiment Videos

[A novel light-emitting diode-induced fluorescence detector for micro-scale flow analysis system].

Bing-Cheng Yang1, Feng Tan, Ya-Feng Guan

  • 1Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116012, China.

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|March 21, 2006
PubMed
Summary

A new compact, all-solid-state fluorescence detector offers sensitive detection for micro-scale flow analysis. It achieves a 10(-8) mol/L limit of detection for FITC-labeled phenylalanine using capillary electrophoresis.

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Instrument Development

Context:

  • Micro-scale flow analysis systems require sensitive and compact detection methods.
  • On-column detection offers advantages for coupling analytical techniques with microfluidics.
  • Fluorescence detection is a sensitive technique for analyzing labeled biomolecules.

Purpose:

  • To describe a novel compact light-emitting diode-induced fluorescence detector.
  • To evaluate the detector's performance using fluorescein isothiocyanate (FITC) and FITC-labeled amino acids.
  • To demonstrate its applicability in capillary electrophoresis and flow injection analysis.

Summary:

  • A compact, all-solid-state fluorescence detector utilizing a collinear scheme was developed.

Related Experiment Videos

  • The detector was coupled with micro-scale flow systems in an on-column detection mode.
  • Excellent performance was demonstrated with a limit of detection of 10(-8) mol/L for FITC-labeled phenylalanine, a linear response (r2 = 0.999) from 1 x 10(-7) to 2 x 10(-5) mol/L, and a relative standard deviation < 3%.

    • Impact:

    • Provides a sensitive and robust fluorescence detection solution for micro-scale analytical systems.
    • Facilitates on-column detection, simplifying integration with capillary electrophoresis and flow injection analysis.
    • Enables precise quantification of trace analytes in complex biological and chemical samples.