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目前沿用的鉴定氧化钐产品纯度的直接发射光谱法或化学光谱法只测定与钐邻近的五个稀土杂质。国外报道过用多种手段测定全部稀土杂质。因为矿源和工艺不同,氧化钐产品中稀土杂质含量会有很显著的差别,有必要建立纯氧化钐中所有稀土杂质的测定方法。为此,通过试验研究,拟定了控制气氛激发,一次摄谱同时测定氧化钐中14个稀土杂质的方法。可测定总量(∑R_xO_y)低达450ppm的杂质。1.分析步骤纯氧化钐试样在900℃灼烧后,与光谱纯碳粉按1∶1混合研匀,装入杯型碳电极中。置于高温电炉内烘烤半小时。在一级色散2.5埃/毫米的3.4米平面光谱
Currently used to determine the purity of samarium products by direct emission spectroscopy or chemical spectrometry only determine the five rare earth impurities and samarium. Abroad reported using a variety of means to measure all the rare earth impurities. Because of the different ore sources and processes, the content of rare earth impurities in samarium oxide products will have significant differences. It is necessary to establish the determination method of all rare earth impurities in pure samarium oxide. Therefore, through the experimental study, the method of controlling atmosphere excitement and simultaneous determination of 14 rare earth impurities in samarium oxide was developed. The total amount (ΣR_xO_y) can be measured as low as 450ppm impurities. 1. Analysis steps Pure samarium oxide sample after burning at 900 ℃, mixed with the spectrum of pure carbon powder 1: 1 evenly, cupped carbon electrode. Placed in a high temperature electric baking within half an hour. Dispersion in the first order of 2.5 angstroms / mm 3.4 m plane spectrum