【摘要】 本法取20mg 铌钽、稀土单矿物样品,采用熔融、压薄样法,克服矿物效应和减少用样量,以 Mo Kα、Mo KαⅡ线作内标,控制制样与测量精度,采用透空照射法,降低散射背景与痕量元素的检测限,直接提供26个元素的分析数据,方法简便、快速、具有良好的精密度和准确度。更多还原

【Abstract】 A rapid and simple method for the determination of major and trace elements in nioblum-tantalum and rare earth minerals by XRF was studied.A sample of only 20 mg was fused and pressed to a thin disc.The Mo K_αⅠ and MoK_αⅡ were used as internal standard to control the procedure of sample preparations and measurements.The transmi- ssion method was used to reduce the background scattering intensity and the detection limits of trace elements.The results of 26 elements were satisfactory.更多还原