Accession Number : AD0428773


Title :   X-RAY FLUORESCENCE ANALYSIS OF RARE EARTH METALS,


Corporate Author : TECHNISCHE HOCHSCHULE VIENNA (AUSTRIA)


Personal Author(s) : LIHL,F


Report Date : 31 Oct 1962


Pagination or Media Count : 22


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)


Descriptors :   *RARE EARTH ELEMENTS , QUANTITATIVE ANALYSIS , ALLOYS , MANGANESE ALLOYS , X RAY SPECTRA , FLUORESCENCE , GADOLINIUM ALLOYS , YTTRIUM COMPOUNDS , EXCITATION


Distribution Statement : APPROVED FOR PUBLIC RELEASE