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A dynamic calibration technique for temperature programmed desorption spectroscopy.

K E Hurst1, M J Heben, J L Blackburn

  • 1National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80403, USA. katherine.hurst@nrel.gov

The Review of Scientific Instruments
|March 8, 2013
PubMed
Summary
This summary is machine-generated.

A new calibration method enhances quantitative gas desorption analysis using temperature programmed desorption (TPD) spectroscopy. This technique accurately measures gas amounts beyond typical instrument limits, verified with hydrogen standards.

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Spectroscopy

Background:

  • Quantitative gas desorption measurements are crucial for material characterization.
  • Traditional methods using temperature programmed desorption (TPD) spectroscopy face limitations in accuracy beyond the linear regime.
  • Accurate calibration is essential for reliable TPD analysis.

Purpose of the Study:

  • To present a novel, rapid, and accurate calibration procedure for quantitative gas desorption measurement using TPD spectroscopy.
  • To enable accurate gas quantification beyond the linear regime of TPD instruments.
  • To provide a versatile calibration method applicable to various pure gases.

Main Methods:

  • Developed a calibration procedure associating an instantaneous calibrated molar flow rate of gas with the detector response.
  • Employed fundamental principles for the calibration technique.
  • Independently verified the method by comparing results to the known hydrogen desorption capacity of a standard metal hydride.

Main Results:

  • Achieved quantitative gas desorption measurement beyond the linear regime.
  • Demonstrated the accuracy of the TPD calibration procedure for hydrogen.
  • The calibration method is applicable to any pure gas.

Conclusions:

  • The presented TPD calibration procedure offers a significant advancement for accurate quantitative gas desorption analysis.
  • This method overcomes limitations of traditional TPD techniques, enabling measurements in non-linear ranges.
  • The validated procedure provides a reliable tool for material research and gas analysis.