Tx100增敏碲化镉量子点荧光猝灭法分析诱惑红.pdf

Hans Journal of Chemical Engineering and Technology 化学工程与技术, 2016, 6(3), 43-54 Published Online May 2016 in Hans. /journal/hjcet /10.12677/hjcet.2016.63006 Determination of Allura Red by Tx-100 Sensitization CdTe QDs Fluorescence Quenching Method Liu Ye, Xiashi Zhu College of Chemistry Chemical Engineering, Yangzhou University, Yangzhou Jiangsu th st th Received: Apr. 29 , 2016; accepted: May 21 , 2016; published: May 24 , 2016 Copyright © 2016 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract The fluorescence quenching effect of Allura red on the water-soluble CdTe quantum dots (CdTe QDs) in surfactant Tx-100 medium was investigated. Based on the Tx-100 sensitization CdTe QDs fluorescence quenching, a novel method for the determination of Allura red was proposed. Under the optimal conditions, the relationship of Allura red concentration in the 0.6 - 60.0 µg/mL range and CdTe QDs fluorescence quenching value was linear. The linear regression equation and the linear correlation were ΔF = 12.86c-77.36 (c:µg/mL) and 0.9939, respectively. The limit of detec- tion was found to be 0.35 µg/mL (the definition of limit of detection was LOD = 3σ/k, where σwas the standard deviation and k was the slope of the standard curve). The sensitized mechanism and fluorescence quantum yield in different media were discussed preliminarily. The method has been applied to the determination of Allura red in samples with satisfactory results. Keywords Allura Red, Cadmium Telluride Quantum Dots, Tx-100, Sensitization, Fluorescence Quenching Tx-100增敏碲化镉量子点荧光猝灭法 分析诱惑红 叶 柳，朱霞石