caa a22 4500 465746543 CHVBK 20180323111822.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00322554 doi (NATIONALLICENCE)springer-10.1007/BF00322554 Simultaneous determination of Dy, Eu, Sm and Tb by laser induced-time resolved derivative fluorescence [Elektronische Daten] [Jianjun Li, Guanquan Chen, Yun'e Zeng] Summary: In this paper, a highly sensitive laser fluorimetric system coupled with microcomputer is described and the laser induced fluorescence of ternary complexes formed by RE (RE = Dy, Eu, Sm, and Tb) with TFA (Trifluoroacetylacetone) and TOPO (Trioctylphosphine oxide) is studied. The emission spectra (excited at 310 nm) of the TFA/TOPO complexes of the rare earths show that the strongest emission bands are located at 560 nm for Dy, 614 nm for Eu, 644 nm for Sm, and 544 nm for Tb. Thus, it is preferable to establish the detection at these wavelengths. However, it is difficult to detect one single component with high selectivity in a mixed sample, because the emission bands in the 500-700 nm region overlap. In order to improve the selectivity, time resolved and derivative techniques are introduced. The effects of foreign ions on the determinations of these four elements are investigated. The linear relationships between derivatives and the concentrations of Dy, Eu, Sm, and Tb are 5×10−8 to 5×10−6 mol/l, 5×10−10 to 1×10−7 mol/l, 1×10−9 to 2×10−6 mol/l, and 2×10−9 to 2×10−6 mol/l, respectively. The method was used to determine simultaneously the amounts of Dy, Eu, Sm, and Tb in their mixtures and yttrium oxide without pre-separation. Springer-Verlag, 1990 Li Jianjun Department of Chemistry, Wuhan University, 430072, Wuhan, P. R. China aut Chen Guanquan The Centre of Analysis and Measurement, Wuhan University, 430072, Wuhan, P. R. China aut Zeng Yun'e Department of Chemistry, Wuhan University, 430072, Wuhan, P. R. China aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/2(1990-01-01), 139-142 0937-0633 336:2<139 1990 336 216 https://doi.org/10.1007/BF00322554 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00322554 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Jianjun Department of Chemistry, Wuhan University, 430072, Wuhan, P. R. China aut NATIONALLICENCE 700 1- Chen Guanquan The Centre of Analysis and Measurement, Wuhan University, 430072, Wuhan, P. R. China aut NATIONALLICENCE 700 1- Zeng Yun'e Department of Chemistry, Wuhan University, 430072, Wuhan, P. R. China aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/2(1990-01-01), 139-142 0937-0633 336:2<139 1990 336 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer