Bian Q, Peng S, He B, Zhong Z
Guangdong Import & Export Commodity Inspection Bureau, Zhujiang Xincheng, 510623 Guangzhou.
Guang Pu Xue Yu Guang Pu Fen Xi. 2000 Jun;20(3):357-60.
ICP-AES was used for the direct determination of 15 rare earth elements in synthetic solutions and real sample. Spectral interferences between REEs in the mixtures of rare earth were investigated with a high-resolution echelle spectrometer and suitable analytical lines of 15 rare earth elements were selected. The Multicomponent Spectral Fitting(MSF) models were made. The method was used to remove spectral interferences and background. The factors influence the modes were discussed. The influences of acidity and ICP parameters were investigated. The compromise condition of simultaneous determination of 15 REEs was selected. Axially viewed ICP torch was used to determine 15 REEs, The detection limits are Y 0.21 microgram.L-1, La 9.1 micrograms.L-1, Ce 14.1 micrograms.L-1, Pr 1.9 micrograms.L-1, Nd 7.8 micrograms.L-1, Tm 0.37 microgram.L-1, Yb 0.12, Lu microgram.L-1, Ho 0.06 microgram.L-1, Er 0.06 microgram.L-1, Tb 0.53 microgram.L-1, Sm 1.14 micrograms.L-1, Eu 0.09 microgram.L-1, Dy 0.08 microgram.L-1, Gd 0.30 microgram.L-1. The recoveries of this procedure are between 98.4% and 101.7%. The RSD is within 2%. The method is rapid and accuracy.
采用电感耦合等离子体发射光谱法（ICP-AES）直接测定合成溶液和实际样品中的15种稀土元素。用高分辨率阶梯光栅光谱仪研究了稀土混合物中稀土元素之间的光谱干扰，并选择了15种稀土元素合适的分析谱线。建立了多组分光谱拟合（MSF）模型。该方法用于消除光谱干扰和背景。讨论了影响模型的因素。研究了酸度和ICP参数的影响。选择了同时测定15种稀土元素的折衷条件。采用轴向观测ICP炬测定15种稀土元素，检测限分别为：钇0.21μg·L⁻¹、镧9.1μg·L⁻¹、铈14.1μg·L⁻¹、镨1.9μg·L⁻¹、钕7.8μg·L⁻¹、铥0.37μg·L⁻¹、镱0.12μg·L⁻¹、镥0.06μg·L⁻¹、钬0.06μg·L⁻¹、铒0.06μg·L⁻¹、铽0.53μg·L⁻¹、钐1.14μg·L⁻¹、铕0.09μg·L⁻¹、镝0.08μg·L⁻¹、钆0.30μg·L⁻¹。该方法的回收率在98.4%至101.7%之间，相对标准偏差在2%以内。该方法快速、准确。
