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| SPECTROGRAPHIC ANALYSIS OF SMALL AMOUNT OF RARE EARTHS IN ALLOY STEEL |
| LI SHUH-CHO;WANG YU-ME Institute of Metal Research; Academia Sinica |
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Cite this article:
LI SHUH-CHO;WANG YU-ME Institute of Metal Research; Academia Sinica. SPECTROGRAPHIC ANALYSIS OF SMALL AMOUNT OF RARE EARTHS IN ALLOY STEEL. Acta Metall Sin, 1959, 4(1): 81-86.
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Abstract Adding small amount of rare earth elements in alloy steel will improve its certain mechanicalproperties. Direct spectrographic determination of residual rare earth in steel has been generallyregarded as impossible since the complex spectra of the major components of ten prevented the identi-fication and measurement of the weak rare earth lines. In this work the chemico-spectrochemical method is employed. The mercury cathode separ-ation and the ether extraction technique were used for the concentration of R. E. proceeding thespectrographic procedure. Yttrium or thorium is used as carrier and internal standard. The concentrated sample solution is droped on the tip of spectra pure carbon electrodes. A.C. arc (-1)is used to excite the spectra. This method permits the determination of as little as 50 γ of total rare earths in 1 gram sampleof steel with an error of±10％.
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Received: 18 January 1959
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[1] E. W. Spitz, J. R. Simmler, B. D. Field, K. H. Roberts and S. M. Tuthill, Ana. Chem. 26, 304, 1954．
[2] 沈联芳等,化学学报 1958．
[3] А. Н. Зайдель и др. Вестник ЛГУ 22,18,1956． |
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