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Citation: FU Sheng-Hui, LIU Zhong-Fang, LIU Shao-Pu. UV-Vis,Fluorescence and Resonance Rayleigh Scattering Spectra of Cu(Ⅱ)-Ceftriaxone-Erythrosin IonAssociation Complex and Their Analytical Application[J]. Chinese Journal of Applied Chemistry, ;2008, 25(11): 1249-1254. shu

UV-Vis,Fluorescence and Resonance Rayleigh Scattering Spectra of Cu(Ⅱ)-Ceftriaxone-Erythrosin IonAssociation Complex and Their Analytical Application

1.
School of Chemistry and Chemical Engineering, Southwest China Normal University, Chongqing 400715

Corresponding author: LIU Shao-Pu,
Received Date: 19 September 2007
Available Online: 7 December 2007
Fund Project: 国家自然科学基金(20475045)资助项目 (20475045)

In a pH 4.4~5.1 Britton-Robinson(BR) buffer solution,ceftriaxone sodium(CTRX) reacts with Cu(Ⅱ) and Erythrosin(Ery) to form a 1:2:3 ion-association complex,which results in the change of absor-ption spectra,the quenching of fluorescence and the great enhancement of Resonance Rayleigh Scattering(RRS),and the new RRS spectra appear.The maximum RRS wavelength is located at 329 nm.The increment of absorption,the quenching of fluorescence and the enhancement of RRS are all proportional to the CTRX concentration in a certain range.The quantitative determination ranges and the detection limits of the three methods for CTRX are 4.4×10^-7~4.0×10^-6 g/mL and 1.3×10^-7 g/mL(spectrophotometry),2.4×10^-7~1.5×10^-6 g/mL and 7.2×10^-8 g/mL(fluorimetry),and 2.9×10^-8~2.0×10^-6 g/mL and 8.8×10^-9 g/mL(RRS),respectively.The optimum condition of the experiment was investigated.The composition of ion-association complex and the mechanism of reaction were discussed.Besides,the effects of some co-existing substances on the determination of CTRX by RRS were investigated.The RRS method has not only high sensitivity,but also good selectivity.It can be applied to the determination of CTRX in serum and urine samples with satisfactory results.
- Resonance Rayleigh scattering,
- spectrophotometry,
- spectrofluorimetry,
- ceftriaxone sodium,
- Cu(Ⅱ),
- erythrosine
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