Date of Award

Spring 1996

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemistry & Biochemistry

Program/Concentration

Chemistry

Committee Director

John B. Cooper

Committee Member

Kenneth G. Brown

Committee Member

Patricia A. Pleban

Call Number for Print

Special Collections LD4331.C45 F643

Abstract

A dispersive Raman system with charge coupled device (CCD) detection, distributed Bragg reflector (DBR) diode laser excitation, and a fiber optic probe has been developed for the rapid analysis of petrochemicals and fuels. Initially, mock petroleum fuels with analyte concentrations from 1.S - 16% were prepared and analyzed with the system. The inability of the original index guided diode laser to maintain a constant frequency during the mock petroleum analysis was a recurrent problem. The DBR laser was subsequently shown to have stability superior to index guided lasers, and was used in the remainder of the research.

Real gasoline samples which had been analyzed by ASTM methods were supplied by Ashland Petroleum Inc. The Raman system was used to reanalyze them. The results indicated that the Raman system was able to give predictive results in agreement with the ASTM methods in much shorter times, typically less than a minute per sample.

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DOI

10.25777/8wnk-tm89

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