论文部分内容阅读
近几年来,随着仪器的进步和分析技术的发展,X射线荧光光谱滤纸片法在合金薄膜、合金主成份、环保样品及稀土等的测定中得到广泛地应用.在合金主成份的测定中,以往均采用加入内标法以消除制样误差和仪器波动对测量的影响.由于加入内标元素不易选择或选择不当等原因,都会给方法的建立带来困难.为此,本文在文献[4]的基础上,以Nb-Ti-Ta三元合金为例提出了多元合金组份测定的新方法—比值计算法.该法的基本想法是,对于任何一个多组份体系的薄试样,例如滤纸片试样或合金薄膜固体试样等,如果选定其中一个组份作为内标元素,那末其他组份与选定的内标元素之间的含量比是固定不变的.根据薄试样中元素间的含量比与其强度比之间的线性关系,以及含量归一化条件(试样中杂质含量忽略不计),建立起联立
In recent years, along with the advancement of instruments and the development of analytical techniques, the X-ray fluorescence spectrum filter paper method has been widely used in the determination of alloy thin films, alloy main components, environmental samples and rare earths etc. In the determination of the main components of the alloy , In the past are used to join the internal standard method to eliminate the sample preparation error and instrument fluctuations on the measurement.Because the addition of internal standard elements is not easy to choose or choose improper and other reasons, will give the method to create difficulties.Therefore, this article [ 4] based on Nb-Ti-Ta ternary alloy as an example of a new method for determining the composition of multiple alloys - ratio calculation method of the basic idea is that for any multi-component system of a thin sample , Such as filter paper samples or solid samples of alloy thin films, etc., if one of the components is selected as the internal standard element, then the content ratio between the other components and the selected internal standard element is fixed. The content of the sample in the ratio between the ratio of its intensity ratio between the linear relationship, as well as the content of normalized conditions (impurities in the sample negligible), establish simultaneous