title: The co-luminescence effect of Eu-Gd-ofloxacin-SDBS system and its analytical application.
abstract: A fluorescence enhancement phenomenon in the europium (Eu)-Ofloxacin (OF)-Sodium Dodecyl Benzene Sulfonate (SDBS) fluorescence system was observed when Gd(3+) was added. The fluorescence intensity of the systems was measured (lambda (ex)/lambda (em) = 280/612 nm) at pH 7.8. Under optimum conditions, a linear relationship between the enhanced fluorescence intensity and the Eu(3+) concentration in the range of 5.0 x 10(-10) approximately 2.0 x 10(-7) mol x L(-1) was observed. The detection limit of Eu(3+) was 1.46 x 10(-10) mol x L(-1) (S/N = 3). This method was used for the determination of trace amounts of europium in synthetic rare earth samples with satisfactory results. In addition, the interaction mechanism is also studied.
authors.affiliation: Department of Chemistry, Zaozhuang University, Shandong 277160, P.R. China. wf332@uzz.edu.cn
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.forename: Yong
authors.initials: Y
authors.lastname: Hou
authors.forename: Zhenni
authors.initials: Z
authors.lastname: Xu
mesh_terms: D005063:Europium / Q000737:chemistry*; D005453:Fluorescence; D005682:Gadolinium / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D049449:Luminescence; D015394:Molecular Structure; D015242:Ofloxacin / Q000737:chemistry*; D009994:Osmolar Concentration; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D012967:Sodium Dodecyl Sulfate; D005063:Europium; D015242:Ofloxacin; D005682:Gadolinium