Accession Number : AD0668097

Title :   AN ANALYSIS OF THE COMBINATION SCATTERING SPECTRUM OF DIMETHYL BENZENE,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Liu,Wen-pai ; Chang,Pao-zen ; Wang,Yu-chuen

Report Date : 03 MAY 1967

Pagination or Media Count : 15

Abstract : Quantitative analysis of Raman spectra is based on the principle that a compound's content is proportional to its spectral intensity, which is also closely related to the equipment used and to operating conditions. A Hilger E-612 spectrograph with an FL-1 type low voltage mercury lamp as the light source was used to study those factors affecting the intensity of Raman spectra and the suitable operating conditions for this equipment. Intensities of Raman spectra of some hydrocarbons thus collected were found to agree with the reported data. Intensity of Raman spectra was determined by comparing it with that of fluorescence spectra of the standard substance. The Raman spectra were taken by exciting the strongest mercury line of 4358 angstrom and a saturated aqueous solution of sodium nitrite was used as the light filtering liquid. The fluorescence spectra utilized excitation of the mercury line of 3650 angstroms of quinine sulfate fluorescence and a solution of 1 mole of cupric nitrate and 2.5 moles of ethylene diamine was used as the light filtering liquid. Quantitative analysis of optical mixtures, mixtures of known composition, and xylene produced as a by-product by a steel mill was satisfactorily conducted. Hydrocarbons of low aliphatic content may directly undergo Raman spectral analysis with good results without chromatographic fractionation. (Author)

Descriptors :   (*XYLENES, *RAMAN SPECTROSCOPY), SPECTROMETERS, MERCURY LAMPS, HYDROCARBONS, FLUORESCENCE, BAND SPECTRA, CHINA

Subject Categories : Organic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE