X-RAY FLUORESCENCE ANALYSIS OF RARE EARTH METALS,

Abstract

The problem of analysing RE-manganese alloys, which is difficult with conventional chemical methods when small specimens are concerned and when high accuracy is required, can be solved by means of X-ray fluorescence analysis. The factors which are of influence here, as f. i. matrix effects, excitation conditions, counter statistics,etc., are discussed in detail. A method is given by which RE (Gd, Sm, Y)-manganese alloys (RE : Mn = from 1:100 to 100:1) can be quantitatively analysed in specimens from 0.001 to 0.02 gr and with an accuracy of 0.5 per cent (relative) and a statistical certainty of 99.7 per cent. For the Gd-Mn system the calibration curve, limit of detection (Gd : 0,002 g/l; Mn: 0,001 g/1), and determinable difference of concentration in two specimens are give numerically. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 31, 1962
Accession Number
AD0428773

Entities

People

  • F. Lihl

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Alloys
  • Calibration
  • Detection
  • Excitation
  • Fluorescence
  • Manganese
  • Manganese Alloys
  • Metals
  • Rare Earth Elements
  • Statistics
  • X Rays

Readers

  • Calculus or Mathematical Analysis
  • Materials Science and Engineering.
  • Regression Analysis.