ICP emission spectrometric analysis of rare earth elements in permanent magnet alloys
ICP emission spectrometric analysis of rare earth elements in permanent magnet alloys
复制标题
永磁合金中稀土元素的ICP发射光谱分析
DOI：
10.1007/bf00323334
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
V. Hudnik
中科院分区：
文献类型：
--
作者：
M. Renko;A. Osojnik;V. Hudnik
采用电感耦合等离子体发射光谱法测定钕铁硼永磁合金中稀土元素。光谱干扰，所产生的重叠，以及基质效应进行了研究。综合考虑光谱干扰、谱线灵敏度、背景强度和样品化学成分等因素，选择了最佳谱线。由于NdFeB永磁合金样品中的不利浓度比，需要通过离子色谱法将基体元素与稀土元素初步分离。对α-羟基异丁酸和不同色谱柱（NUCLEOSIL、SULFOPYL SI-100、DIONEX HPIC-CS3）的不同洗脱模式（等度和梯度）进行了检测。已为每种元素选择了最佳分离条件，并建立了所选元素在相同或不同浓度下的分离效率。虽然稀土元素的分离导致部分重叠峰，但提高了分析物与被测物的比值，消除了光谱干扰。所得结果与认证值吻合良好。
An analytical method for the determination of rare earth elements (REE) in a NdFeB permanent magnet alloy by ICP emission spectrometry is described. Spectral interferences, arising from overlapping, as well as matrix effects have been studied. Considering spectral interferences, sensitivities of spectral lines, background intensities and the chemical composition of the sample investigated, optimum spectral lines for each REE have been selected. Because of an unfavourable concentration ratio in samples of a NdFeB permanent magnet alloy, a preliminary separation of matrix elements from rare earth elements by ion chromatography is necessary. Different modes of elution (isocratic and gradient) with α-hydroxy-isobutyric acid and different columns (NUCLEOSIL, SULFOPROPYL SI-100, DIONEX HPIC-CS3) have been tested. Optimum separation conditions have been chosen for each element and the separation efficiency at equal or different concentrations of the selected elements have been established. Although the separation of REEs resulted in partly overlapping peaks, the ratio between analyte and interferent is improved and the spectral interferences are diminished. The results obtained are in good agreement with certified values.