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《Journal of Anhui Normal University(Natural Science)》 2009-01
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Fluorometric Spectral Study of P-Sulfonated Calix[6]arene-Lomefloxacin-CTAB System and Its Application

CHU Qian1,WEI Qing-yun2,CHEN Biao1,LU Qin1,ZHOU Yun-you1(1.College of Chemistry and Materials Science,Anhui Normal University,Wuhu 241000,China;2.Department of Chemical Engineering,Weifang University of Science and Technology,Weifang 262700,China)  
The characteristics of host-guest complexation between p-sulfonated calix[6]arene(SC6A) and lomefloxacin(LFLX) were investigated by fluorescence spectrometry.LFLX has strong fluorescence with emission wavelength of 456.0 nm and the addition of SC6A quenched the fluorescence intensity.1:1 stoichiometry for the complexation was established and their association constant was determined as 8.62×105L/mol by applying a deduced equation.It was found that an appropriate amount of cationic surfactant cetyltrimethylammonium bromide(CTAB) could remarkably enhance the fluorescence intensity of the supramolecular complex system.Based on the optimum condition,a novel sensitive spectrofluorimetric method for the determination of lomefloxacin was developed with a linear range of 0.01-2.8μg·mL-1 and a detection limit of 0.008μg·mL-1.The proposed method was satisfactorily to determine lomefloxacin in pharmaceutical preparations.
【Fund】: 国家自然科学基金资助(20875002)
【CateGory Index】: R927.1
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