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用直接光谱分析法分析化学成分复杂的样品会遇到一系列的困难。基物定量组成和定性组成的变化对谱线的绝对强度和相对强度的大小有影响,因为当样品成分不同时,电弧温度的变动范围很大。本文所研究的是关于天然物质中经常与铀伴生的元素钛、锆和钍对微量铀的光谱测定准确度的影响问题。被测的铀含量为5×10(-7)-1×10(-4)克,伴生元素的含量大大超过了样品中的铀含量。研究方法是:用含有呈溶液状态而加入到样品中去的不同数量的钛、锆和钍的合成混合物为
There are a number of difficulties encountered in the direct spectroscopic analysis of complex samples of chemical composition. Changes in the quantitative composition and qualitative composition of the substrate have an effect on the absolute intensity of the line and the magnitude of the relative intensity because the temperature of the arc fluctuates in a wide range when the composition of the sample is different. This article addresses the issue of the effect of titanium, zirconium and thorium, the uranium-associated elements of natural materials, on the accuracy of spectrometric determination of trace uranium. Measured uranium content of 5 × 10 (-7) -1 × 10 (-4) grams, the content of accompanying elements greatly exceeded the sample of uranium content. The method of study is to use a synthetic mixture of different amounts of titanium, zirconium and thorium, which are added to the sample in solution, as