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An improved multiple flame photometric detector for gas chromatography.

Adrian G Clark1, Kevin B Thurbide1

  • 1Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada.

Journal of Chromatography. A
|April 25, 2015
PubMed
Summary

A new stainless steel multiple flame photometric detector (mFPD) offers enhanced sensitivity and selectivity for sulfur and phosphorus detection. This improved design provides a more robust and versatile tool for gas chromatography analysis.

Keywords:
DetectionGas chromatographyMultiple flamePhotometricSulfur

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Area of Science:

  • Analytical Chemistry
  • Instrumental Analysis

Background:

  • Traditional quartz tube multiple flame photometric detectors (mFPD) face limitations in background emission and sensitivity.
  • Previous prototypes required optimization for enhanced sulfur and phosphorus detection in gas chromatography.

Purpose of the Study:

  • To introduce an improved multiple flame photometric detector (mFPD) utilizing a planar stainless steel (SS) plate with integrated fluidic channels.
  • To evaluate the performance enhancements of the SS mFPD compared to the previous quartz tube prototype, focusing on sulfur and phosphorus detection.

Main Methods:

  • Fabrication of a planar stainless steel plate with interconnected fluidic channels for the mFPD.
  • Experimental analysis of sulfur and phosphorus response, including linearity, detection limits, and selectivity over carbon.
  • Assessment of resistance to hydrocarbon response quenching and evaluation of analyte emission monitoring in multiple worker flames.

Main Results:

  • The SS mFPD achieved a 50% reduction in background emission levels and an orthogonal analytical flame.
  • Sulfur detection showed a 4-orders-of-magnitude linear range, a minimum detectable limit of ~9×10(-12)gS/s, and selectivity of ~10(4) over carbon.
  • Phosphorus detection exhibited a 6-orders-of-magnitude linearity with a detection limit of ~2.0×10(-13)gP/s, with significantly improved signal-to-noise ratio in collective worker flames.

Conclusions:

  • The stainless steel mFPD design offers significant improvements in analytical performance, including reduced background emission, enhanced sensitivity, and superior selectivity.
  • The ability to monitor analyte emission in multiple worker flames provides a novel capability for improved sulfur and phosphorus detection.
  • The developed SS mFPD is a versatile and beneficial monitoring tool for gas chromatography applications.