X—射线荧光光谱中,直接压饼或四硼酸锂熔饼法,具有简便、快速的优点,但测定～10ppm以下含量的稀土元素是相当困难的。用离子交换纸制样,X—射线荧光光谱测定稀土元素及钪,可降低检测限至0.xppm,甚至更低。与中子活化法,同位素稀释质谱法相比,本法价廉、方便、快速。与国内同类方法相 X-ray fluorescence spectroscopy, direct pressure cake or lithium tetraborate melt method, with the advantages of simple, fast, but the determination of ~ 10ppm the following content of rare earth elements is quite difficult. Determination of rare earth elements and scandium by X-ray fluorescence spectrometry using ion-exchange paper samples reduces the detection limit to 0.x ppm and even lower. Compared with neutron activation and isotope dilution mass spectrometry, this method is cheap, convenient and rapid. Similar methods with the domestic phase