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关于合金钢中稀土元素(总量)的测定,我们曾介绍过氢氟酸沉淀,偶氮胂Ⅰ显色的方法,曾广泛应用于不锈钢、低合金钢等。但对于ЭИ702镍基合金,含稀土量较低时,测定就较困难。因此,对这一材料,试验了微量稀土的测定方法。自从合成偶氮胂Ⅲ,以及对其合成方法有所改进以来,偶氮胂Ⅲ的应用及性质介绍较多,可用于钍、铀、锆、稀土等元素的测定,国内亦相继应用。本文首先对显色时金属离子干扰情况
About the determination of rare earth elements (total) in alloy steel, we have introduced hydrofluoric acid precipitation, arsenazo Ⅰ color method, has been widely used in stainless steel, low alloy steel. However, for ЭИ702 nickel-based alloys, the lower the amount of rare earth, the determination is more difficult. Therefore, for this material, the method of measuring trace rare earths was tested. Since the synthesis of arsenazo III, and the improvement of its synthesis methods, arsenazo Ⅲ has more applications and properties, which can be used for the determination of thorium, uranium, zirconium, rare earth and other elements, which are also applied in China. In this paper, the first color of the metal ions interfere with the situation