A Study of the Fluorescence System of Tetracycline-Eu-TOPO-Sodium Dodecyl Sulfonate System and the Determination for Tetracycline

Abstract

Abstract: The Eu-tetracycline-TOPO-sodium dodecyl sulfonate system was studied.Experiments showed that the maximum fluorescence intensity was obtained in the pHrange 7.5-8.7 and when the concentration of Eu³⁺, TOPOand sodium dodecyl sulfonate were 1.0× 10^-5 mol/L, 1.0 × 10^-3 mol/Land 1.0× 10^-3 mol/L, respectively.This fluorescence system can be used for the determination of tetracycline in serum and urine.The linear dynamic range is 2.0× 10^-8 mol/L-1.0×10^-5 mol/Lfor tetracycline.The detection limit is 1.2× 10^-8 mol/L.The composition of the tetracycline (TC)-Eu-TOPO-sodium dodecyl sulfonate (SDS) complex was examined by using slope-ratio, mole-ratio and continuous change methods.The experiments showed that the ion association complex [Eu(TC) (TOPO)_m]⁺ (SDS)^- was formed in the system.The luminescence of complex belonged to M^*→Mluminescence mechanism.The fluorescence enhancement is due to the formation of the ion association complex and the micelles.

Key words: Europium, Tetracycline determination, Spectrofluorimetry

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YANG Jing-He, ZOU Hua-Bin, JIE Nian-Qin, GE Hong-Mei . A Study of the Fluorescence System of Tetracycline-Eu-TOPO-Sodium Dodecyl Sulfonate System and the Determination for Tetracycline[J]. Chem. J. Chinese Universities, 1993, 14(3): 339.

References

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