建立了采用波长色散X射线荧光光谱仪测定水样中微量铈的方法。测定结果表明,测量单个样品需100 s,检出限为0.6μg/g。当铈浓度的线性范围为1~1×104μg/g,相对标准偏差不大于1.28%,加标回收率为97.2%~98.6%。该方法快速、准确、环保,不受铈离子价态、水样pH值和共存离子的明显影响。 A method for the determination of trace cerium in water samples by wavelength dispersive X-ray fluorescence spectrometer was established. The results show that the measurement of a single sample to be 100 s, the detection limit of 0.6μg / g. When the linear range of cerium concentration was 1 ~ 1 × 104μg / g, the relative standard deviation was no more than 1.28%, and the recoveries were 97.2% ~ 98.6%. The method is rapid, accurate and environmentally friendly, and is not affected by the valence of cerium ions, the pH of water samples and the coexisting ions.