ScI3-NaI-ThI4中Sc和Th的测定方法

利用Ｘ射线荧光分析法和铬合滴定分析法实验测定ＳｃＩ３－ＮａＩ－ＴｈＩ４中的Ｓｃ和Ｔｈ。实验研究了Ｘ射线荧光分析法测定Ｓｖ的仪器工作条件及不同制样方法对Ｓｃ和Ｔｈ测定的影响；采用聚酯膜制样技术建立了Ｘ射线荧光分析测定Ｓｃ和Ｔｈ的方法，精密度优于４％；研究了络合滴定分析方法中酸度，温度对滴定终点的影响，比较了不同滴定方法的测量结果，建立了ＳｃＩ３－ＮａＩ－ＴｈＩ４产品中Ｓｃ和Ｔｈ的络合滴定测量方法，其

DETERMINATION OF Sc AND Th IN ScI3-NaI-ThI4 SAMPLE

Determination of Sc and Th in ScI 3 NaI ThI 4 sample is studied by X ray fluorescence and complexometry.The effect of working condition of Sc on X ray fluorescence spectrometer and different sample making method on the determination of Sc and Th are studied experimentally. The X ray fluorescence analysis of determination of Sc and Th is developed by polyester film sample making technique, the measuring precision of Sc and Th is better than 4 %. The effect of acidity and temperature on the determining end point of titration is obvious. The results of different complexometric methods are compared. The precision of Sc and Th is less than 2 % by comlexometry, it is fit for the routine analysis of ScI 3 NaI ThI 4 sample.