Vassilaros G L, McKaveney J P
Crucible Steel Research Laboratories, P.O. Box 988, Pittsburgh, Pennsylvania 15230, U.S.A.
Talanta. 1969 Feb;16(2):195-200. doi: 10.1016/0039-9140(69)80270-5.
An X-ray solution method is proposed for determining major amounts of Mo, Sn and Zr in Ti alloys. The method utilizes adjacent elements in the periodic table as internal standards and has been successfully applied to levels of 3-10% Sn, 11-40% Mo and 6-20% Zr. The procedure involves three steps: dissolving the sample with a suitable acid mixture; adding the suitable internal standard at the concentration levels experimentally found to give optimum accuracy and precision; analysing the resulting solution mixture by X-ray fluorescence. Antimony was found to be a suitable internal standard for its adjacent element tin at a concentration ratio of 3:1 Sb:Sn. Niobium was successfully used for both its adjacent elements, molybdenum and zirconium, at 2:1 concentration ratios, Nb:Mo and Nb:Zr. A number of elements non-adjacent to tin, molybdenum and zirconium (i.e., copper, bromine, titanium, bismuth and tantalum) were experimentally found unsuitable as internal standards. Concentration factors of the internal standard and the adjacent elements sought were found to affect significantly the precision of analysis.
提出了一种用于测定钛合金中主要成分钼、锡和锆的X射线溶液分析法。该方法利用元素周期表中的相邻元素作为内标，已成功应用于3 - 10%锡、11 - 40%钼和6 - 20%锆含量的分析。该程序包括三个步骤：用合适的酸混合物溶解样品；以实验确定的能给出最佳准确度和精密度的浓度水平加入合适的内标；通过X射线荧光分析所得的溶液混合物。发现锑是其相邻元素锡的合适内标，锑与锡的浓度比为3:1。铌成功地用于其相邻元素钼和锆，铌与钼、铌与锆的浓度比均为2:1。通过实验发现，一些与锡、钼和锆不相邻的元素（即铜、溴、钛、铋和钽）不适合作内标。发现所寻求的内标和相邻元素的浓度因子对分析精密度有显著影响。
