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Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
08:53

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Published on: October 9, 2012

Temperature-resolved molecular emission spectroscopy:  an analytical technique for solid materials.

D W Johnson1, C S Saba, J D Wolf

  • 1Department of Chemistry, University of Dayton, 300 College Park, Dayton, Ohio 45469-2357.

Analytical Chemistry
|June 7, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces temperature-resolved molecular emission spectroscopy, a thermal analysis technique for solids and liquids. It effectively determines the quantity and nature of decomposed species, especially sulfur, phosphorus, and nitrogen.

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Spectroscopy

Background:

  • Thermal analysis methods are crucial for characterizing solid and liquid samples.
  • Existing techniques may have limitations in identifying specific elemental compositions and decomposition behaviors.

Purpose of the Study:

  • To present temperature-resolved molecular emission spectroscopy as a novel thermal analysis method.
  • To demonstrate its capability in analyzing decomposed species, with a focus on sulfur, phosphorus, and nitrogen.

Main Methods:

  • Utilizing an electrically heated graphite cup for sample decomposition and vaporization.
  • Employing a stream of argon to transport vapors into a cool hydrogen diffusion flame for analysis.
  • Measuring molecular emission to determine the quantity and nature of decomposed species.

Main Results:

  • The technique successfully determines both the quantity and nature of decomposed species.
  • Calibration curves for sulfur exhibited a parabolic shape, while phosphorus showed linear behavior.
  • A detection limit of approximately 50 ng for elemental sulfur was achieved.
  • Sulfur evolution correlated with decomposition temperature, characteristic of sulfur-containing species.
  • Reproducibility of decomposition temperatures was typically ±2%.

Conclusions:

  • Temperature-resolved molecular emission spectroscopy is an effective thermal analysis method for solids and liquids.
  • The technique offers valuable insights into the composition and decomposition characteristics of sulfur-, phosphorus-, and nitrogen-containing compounds.
  • Its sensitivity and reproducibility make it suitable for quantitative elemental analysis.