稀土元素铈和镥的激光增强电离光谱与痕量分析

LASER ENHANCED IONIZATION SPECTROMETRY AND SENSITIVE DETECTION OF RARE-EARTH ELEMENTS CERIUM AND LUTETIUM IN FLAME

在国内外首先研究了稀土元素铈(Ce)和镥(Lu)的激光增强电离(LEI)光谱。在可见区用YAG倍频激光器泵浦的可调谐染料激光器检测了Ce Ⅰ578.815nm,Ce Ⅰ574.353nm,Lu Ⅰ573.655nm三条LEI光谱线。用LEI光谱方法测量的稀土元素Ce、Lu的检测限优于在火焰中的原子吸收光谱方法和ICP-AES方法,Ce、Lu、的检测限分别为4ng/ml、8ng/ml。

Laser enhanced ionization (LEI) spectrometry of rare-earth elements cerium (Ce) and lutetium (Lu) have been researched for the first time and Ce Ⅰ 578.815nm, Ce Ⅰ 574.353nm, Lu Ⅰ 573.655nm were detected by tunable Rodamine 6G dye laser pumped by YAG laser. The detection limits of Ce, Lu by using LEI spectrometry method is lower than AAS (atomic absorption) in flame and ICP-AES. The lowest detection limit of Ce obstained in this work was 4ng/ml and the lowest detection limit of Lu was 8ng/ml.