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Related Experiment Video

Updated: May 19, 2026

Chemical Analysis of Water-accommodated Fractions of Crude Oil Spills Using TIMS-FT-ICR MS
08:17

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Published on: March 3, 2017

Terahertz spectroscopy for quantifying refined oil mixtures.

Yi-nan Li1, Jian Li, Zhou-mo Zeng

  • 1State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China. lin860405@gmail.com

Applied Optics
|August 22, 2012
PubMed
Summary

This study uses terahertz time-domain spectroscopy to analyze gasoline and diesel mixtures. A regression method accurately determines the volume fractions of these refined oil components.

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Area of Science:

  • Spectroscopy
  • Analytical Chemistry
  • Materials Science

Background:

  • Accurate quantification of refined oil mixtures is crucial for storage and transportation.
  • Traditional methods may lack precision for complex fuel blends.

Purpose of the Study:

  • To develop a quantitative analysis method for gasoline and diesel mixtures.
  • To identify an optimal frequency band for regression analysis of terahertz spectra.
  • To validate the accuracy of the proposed method using Beer-Lambert law.

Main Methods:

  • Terahertz time-domain spectroscopy (THz-TDS) was employed to obtain absorption coefficient spectra.
  • A novel method was developed to select the best frequency band for regression.
  • Dualistic linear regression fitting, based on the Beer-Lambert law, was used for component quantification.

Main Results:

  • The regression fitting achieved a minimum R-Square value of 0.99967.
  • The mean error for the fitted volume fraction of gasoline was determined to be 4.3%.
  • Spectra in the terahertz frequency range proved effective for quantitative analysis.

Conclusions:

  • Terahertz spectroscopy offers a viable method for the quantitative analysis of refined oil mixtures.
  • The proposed regression-based approach provides accurate determination of component volume fractions.
  • This technique shows significant potential for applications in the refined oil storage and transportation industry.