氧化铥中14个稀土杂质发射光谱测定的研究  

EMISSION SPECTROMETRIC DETERMINATION OF TRACE RARE-EARTH ELEMENTS IN THULIUM OXIDE

作　　者：余素清[1] 黎明[1] 

机构地区：[1]南开大学化学系,天津300071

出　　处：《化学研究与应用》1991年第1期90-92,共3页Chemical Research and Application

摘　　要：本文研究了用直流电弧法测定氧化铥中14个稀土杂质的可能性,用正交设计法选择了最佳工作条件,在PGS-2二米平面光栅摄谱仪上摄谱,测定下限分别为:Yb₂O₃0.00015％;Eu₂O₃ 0.0025％;DY₂O₃、Y₂O₃、Sm₂O₃ 0.005％;Tb₄O₇、Ho₂O₃ 0.006％;Nd₂O₃、La₂O₃、CeO₂ 0.01％;Pr₆O₁₁ 0.02％。用logR～logC绘制工作曲线,所得曲线线性良好,回收率为80.5～120.0％,单次测定相对标准偏差为±6.22～17.41％。A simple and sensitive emission-spectrometric method for the determination of trace amounts of rare earth elements in thulium oxide is proposed. Graphite powder (S. P) is used as buffer which is mixed with the sample in the proportion 1:1 by weight and D. C. are is used as the excitation source. The determination limits are: ytterbiuml、5ppm; curopium 5ppm; dysprosium、 yttrium、samarium 50ppm; terbium、holmium 60ppm; lanthanum, ccrium, neodymium 100ppm; Praseodymium 200ppm, gadolinium 20ppm and lutetium erbium 20ppm. The standard deviations are ±6.22～17.41%.

关 键 词：直流电弧法 氧化铥 稀土杂质 

分 类 号：O6[理学—化学]