Accession Number : AD0824907

Title :   LASER FLASH HEATING TECHNIQUES FOR ATOMIC ABSORPTION SPECTROSCOPY.

Descriptive Note : Summary technical rept. 7 Mar 66-31 Aug 67,

Corporate Author : PERKIN-ELMER CORP NORWALK CT ELECTRO-OPTICAL DIV

Personal Author(s) : Macoy, Norman H. ; Zweibaum, Frederic

Report Date : NOV 1967

Pagination or Media Count : 80

Abstract : This report comprises fundamental procedures and techniques employed to utilize a moderate power cw laser for vaporization of metallic alloys with subsequent spectrophotometric analysis. A substantial amount of data is presented for zinc, copper, lead, aluminum, nickel, and tin to illustrate areas of success and problems, the latter being fundamental to a cw laser approach. In several areas, namely absorber path length and analytical mass rate sensitivity, direct comparison is made to the conventional flame approaches of atomic absorption spectroscopy. For zinc, copper and lead, analytical mass rate sensitivities of 0.00029, 0.00047, and 0.00077 microgram/sec/1 percent absorption were determined. For copper, the 4 inch air-acetylene sensitivity is 0.0007 microgram/sec/1 percent absorption. In developing techniques, absorption sample weight dependency and sample vapor shape and size were determined for a number of conditions. Reproducibility for optimum conditions is 15 percent and generally better than 50 percent. The data and subsequent analysis and results constitute a reasonably broad base foundation to the technique of cw laser vaporization for AA spectroscopy. (Author)

Descriptors :   *LASERS), (*ATOMIC SPECTROSCOPY, HEATING, VAPORIZATION, ZINC, COPPER, LEAD(METAL), ALUMINUM, NICKEL, TIN, ABSORPTION SPECTRA, SENSITIVITY, ATOMIZATION.

Subject Categories : Lasers and Masers
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE