Abstract − Analytical Sciences, 20(8), 1237 (2004).
Spectrofluorimetric Determination of Trace Amounts of Europium(III) Ion with Lutetium(III)-Sparfloxacin-Sodium Dodecyl Sulfate Luminescence Enhancement System
Lei WANG
School of Pharmacy, Shandong University, Jinan, China
A new luminescence-enhancement system based on complex formation between europium and sparfloxacin in the presence of lutetium in a sodium dodecyl sulfate solution has been discovered. By adding a suitable amount of Lu3+ to the Eu-sparfloxacin-sodium dodecyl sulfate system, the luminescence can be enhanced by approximately 5-fold compared with that of the system without Lu3+. Under the optimum conditions, the luminescence intensity of the system is a linear function of the concentration of europium in the range of 1.0 × 10-10 - 5.0 × 10-7 mol L-1. The detection limit of europium is 2.0 × 10-13 mol L-1 (S/N = 3). The system was used for the determination of trace amounts of europium in rare earth samples with satisfactory results.
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