Synchronous fluorescence determination of mercury ion with glutathione-capped CdS nanoparticles as a fluorescence probe
Synchronous fluorescence determination of mercury ion with glutathione-capped CdS nanoparticles as a fluorescence probe
复制标题
谷胱甘肽修饰的CdS纳米粒子作为荧光探针同步荧光测定汞离子
DOI：
10.1016/j.talanta.2009.12.021
复制
发表时间：
2010-04-15
期刊：
影响因子：
6.1
通讯作者：
Fu, Jie
中科院分区：
文献类型：
--
作者：
Liang, A. -Ni;Wang, Lun;Fu, Jie
室温下在水溶液中成功合成了谷胱甘肽（GSH）封端的 CdS 纳米颗粒。基于同步荧光光谱(SFS)的特点，建立了一种以GSH修饰的CdS纳米颗粒为荧光探针测定Hg2+的简便、高灵敏度、高选择性的方法。最大同步荧光位于 335 nm，扫描激发波长和发射波长分别为 260 nm 和 440 nm（Delta lambda = lambda(em) - lambda(ex) = 180 nm）。在最佳条件下，猝灭荧光强度随Hg2+浓度在0.15×10(-7)～125×10(-7)mol·L-1范围内呈线性增加。检测限为4.5 x 10(-9) mol·L。与几种荧光方法相比，该方法在线性范围和灵敏度方面表现出多种优点。还讨论了淬火机理。此外，通过水样证明了该方法的分析应用。 (C) 2009 Elsevier B.V. 保留所有权利。
Glutathione (GSH)-capped CdS nanoparticles was successfully synthesized in aqueous solutions at room temperature. Based on the characteristics of synchronous fluorescence spectroscopy (SFS), a simple method with high sensitivity and selectivity was developed for determination of Hg2+ with GSH-capped CdS nanoparticles as a fluorescence probe. The maximum synchronous fluorescence is located at 335 nm, scanning with excitation and emission wavelengths of 260 and 440 nm (Delta lambda = lambda(em) - lambda(ex) = 180 nm), respectively. Under optimal conditions, the quenched fluorescence intensity increased linearly with the concentration of Hg2+ ranging from 0.15 x 10(-7) to 125 x 10(-7) mol L-1. The limit of detection was 4.5 x 10(-9) mol L. Compared with several fluorescence methods, the proposed method exhibited several merits in terms of its linear range and the sensitivity. The quenching mechanism was also discussed. Moreover, analytical application of the method was demonstrated by water samples. (C) 2009 Elsevier B.V. All rights reserved.