The Quantitative Spectrographic Analysis of the Rare Earth Elements,

Abstract

Spectrographic methods applicable to the determination of major rare earth constituents in complex mixtures are described. The specific examples discussed are the determination of yttrium and gadolinium in the concentration range of 10 to 100 per cent. The procedures involve the high current DC arc excitation of rare earth oxide sample-ceric oxide-graphite mixtures. Selected lines of cerium are used as internal standards. The choice of cerium as internal standard was based on the relative ease with which any cerium, if present in a mixture, could be preferentially separated from the mixture, and then reintroduced in a standard amount. Precision studies show a standard deviation of about + or - 2.5 per cent of the amount present. Data are included which indicate that the high precision is attributable to excellent internal standard control of excitation variables. jg p.2

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Document Details

Document Type
Technical Report
Publication Date
Jul 22, 1948
Accession Number
ADA301283

Entities

People

  • Velmer A. Fassel

Organizations

  • Oak Ridge National Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Complex Mixtures
  • Diagrams
  • Elements
  • Energy
  • Gadolinium
  • Graphitic Materials
  • Hydrogen
  • Hydroxides
  • Materials
  • Oxides
  • Physical Properties
  • Precision
  • Rare Earth Elements
  • Rocket Oxidizers
  • Thermal Conductivity
  • Yttrium

Readers

  • Materials Science and Engineering.
  • Systems Analysis and Design