氧化铒中14个稀土杂质的光谱测定,国内外报导较少,文献测定了14个稀土杂质,但测定下限差,文献仅作了相邻5个稀土元素,本文在空气中摄谱,对电极形状等方面进行了研究,最后确定的方法可满足稀土杂质总量在0.03725％以上产品分析的要求。实验 (一)条件的选择 1.电极形状的选择:为使点弧稳定,避免试样喷溅,上电极采用直径2毫米的圆锥截面。对下电极的不同深度和内径进行了试验,结果列于表1。由表1可见,内径相同的电极,孔越深,孔底温度越低,试样的蒸发速度越慢;而孔深 Erbium oxide in the 14 rare earth impurities measured at home and abroad, the literature measured 14 rare earth impurities, but the lower limit of determination, the literature made only five adjacent rare earth elements, the paper in the air spectrum, the electrode Shape and other aspects of the study, the final determination of the method to meet the total amount of rare earth impurities in more than 0.03725% of product analysis requirements. Experimental conditions (a) the choice of conditions 1. The choice of electrode shape: In order to stabilize the arc, to avoid splashing the sample, the electrode with a cone diameter of 2 mm cross-section. The different depth and inner diameter of the lower electrode were tested and the results are shown in Table 1. Can be seen from Table 1, the same diameter electrodes, the deeper the hole, the lower the bottom hole temperature, the slower the evaporation rate of the sample; and the hole depth