A New Method for Trace Metal Determinations by Monitoring Modulated Magnetically Induced Optical Rotation in Atomic Vapours

Abstract

A new atomic magneto-optical rotation spectrometer (AMORS) for the determination of trace metals is described. This instrument differs from previous AMORS devices by utilizing an electronically variable optical retardation element to modulate polarisation and a phase meter for detection of the analytical signal. Preliminary detection limits for Li, K and Mg are comparable to those reported for atomic absorption spectrometry under similar analysis conditions. Furthermore, this novel method of signal detection is insensitive to changes in the light intensity transmitted through the atomizer. Experimental evidence suggests that the spectral bandwidth of the radiation source and the range over which the optical retardation element is varied can significantly affect detection limits. Keywords: Coherent forward scattering, Atomic faraday effect, Elemental analysis.

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Document Details

Document Type
Technical Report
Publication Date
Jul 11, 1988
Accession Number
ADA198799

Entities

People

  • Curtis A. Monnig
  • Gary M. Hieftje

Organizations

  • Indiana University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Amplifiers
  • Chemistry
  • Frequency
  • Graphitic Materials
  • Light Sources
  • Measurement
  • Metals
  • Military Research
  • Modulators
  • Phase Meters
  • Photomultiplier Tubes
  • Power Supplies
  • Scattering
  • Schematic Diagrams
  • Signal Detection
  • Spectrometry
  • United States

Fields of Study

  • Physics

Readers

  • Aerosol Science/Aerosol Physics
  • Materials Science and Engineering.
  • Plasma Physics / Magnetohydrodynamics

Technology Areas

  • Microelectronics