木文中介绍了利用经化学分离及浓缩的处理后再进行光谱测定的方法来分析合金钢中的微量希土元素。测定的灵敏度0.005％(合量)。误差±10％。此外还研究了利用中型色散的仪器测量钢中希土元素的可能性以及直接固体样品激发进行钢中希土元素分析的部题。
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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