Fluorescence enhancement of the Eu-Tb-benzoylacetone-phenanthroline system
1990; Elsevier BV; Volume: 238; Linguagem: Inglês
10.1016/s0003-2670(00)80552-8
ISSN1873-4324
AutoresJinghe Yang, Zhou Huabin, Xuezhen Ren, Li Chong-yu,
Tópico(s)Analytical chemistry methods development
ResumoThe Eu-benzoylacetone-phenanthroline system, which has strong fluorescence intensity, was studied. It was found that the fluorescence intensity can be greatly increased by La, Gd, Tb, Lu and Y, Tb giving the greatest enhancement (ca. two orders of magnitude). The maximum fluorescence intensity was obtained at pH 8.0. Beer's law was obeyed from 1.0 × 10−9 to 2.0 × 10−7 M Eu. The detection limit for europium was 2.0 × 10−11 M.
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