Citation:
LI Qin, TIAN Fengling, ZHOU Shang, FU Lingli, LIU Qu, YANG Jidong. Resonance Rayleigh Scattering, Frequency Doubling Scattering and Fluorescence Spectra of the Eosin Y-Mebendazole System and Their Analytical Applications[J]. Chinese Journal of Applied Chemistry,
;2015, 32(4): 481-488.
doi:
10.11944/j.issn.1000-0518.2015.04.140281
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In pH 3.4~3.9 Britton-Robinson(BR) buffer solution,mebendazole(MBZ) reacts with eosin Y(EY) to form a 1:1 ion-association complex,which not only results in the quenching of fluorescence,but also results in the great enhancement of resonance Rayleigh scattering(RRS) and frequency doubling scattering(FDS). Furthermore,a new RRS spectrum appears,and the maximum RRS wavelength is located at 326 nm.The detection limit for MBZ is 32.31 μg/L using the fluorophotometry,7.24 μg/L by the RRS method and11.65 μg/L by the FDS method. Among them,the RRS method has the highest sensitivity. The experimental conditions were optimized and effects of coexisting substances were evaluated. These methods have been applied to the determination of MBZ in tablets and human urine samples. The composition and structure of the ion-association complex and the reaction mechanism are discussed.
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