The Raman spectrum of approximately 25 hazardous chemicals, both neat and in aqueous solution, were measured, and the chemicals were unambiguously identified with single scans at levels less than 50 ppm. To achieve detectability at lower levels, the Raman data were digitized and signal averaging and smoothing techniques were applied. Sensitivity was increased by a factor of a least 2. With the addition of a dye laser, and by making use of the resonance Raman phenomenon, dyes in aqueous solution and in situ were identified in certain food products at the 2 ppm level. A remote Raman detection system obtained a Raman spectrum for substances in solution at concentrations as low as 20 ppm with the sample located 26 ft away. Results from these studies and spectra of inorganic and organic pollutants are discussed.

  • Corporate Authors:

    Conference on Analytical Chem & Appl Spectroscopy

    Pittsburgh, PA  United States 
  • Authors:
    • Lynch, P F
    • Ahmadjian, M
    • Thibeau, R
    • Brown, C W
  • Publication Date: 1976

Subject/Index Terms

Filing Info

  • Accession Number: 00141593
  • Record Type: Publication
  • Source Agency: Pollution Abstracts
  • Report/Paper Numbers: No. 367
  • Files: TRIS
  • Created Date: Nov 17 1976 12:00AM