DICP OpenIR
Subject Area物理化学
Highly sensitive synchronous fluorescence determination of mercury (II) based on the denatured ovalbumin coated CdTe QDs
Wang, Yan-Qin1,2; Liu, Yang1,2; He, Xi-Wen1,2; Li, Wen-You1,2; Zhang, Yu-Kui1,2,3; Li WY(李文友)
KeywordDenatured Ovalbumin Coated Cdte Qds Synchronous Fluorescence Mercury (Ii) Determination Probe
Source PublicationTALANTA
2012-09-15
DOI10.1016/j.talanta.2012.04.064
Volume99Pages:69-74
Indexed BySCI
SubtypeArticle
Department18
Funding Project1810
Contribution Rank2,5
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Analytical
WOS Research AreaChemistry
WOS KeywordZNS QUANTUM DOTS ; ULTRASENSITIVE DETERMINATION ; GOLD NANOCLUSTERS ; NANOCRYSTALS ; PROTEIN ; NANOPARTICLES ; PROBE ; ION ; SPECTROSCOPY ; TEMPERATURE
AbstractChemically denatured ovalbumin (dOB) was used to modify the surface of 3-mercaptopropionic acid (MPA) stabilized CdTe quantum dots (QDs), which resulted in a great enhancement of the synchronous fluorescence intensity. Moreover, dOB shell layer can effectively prevent the binding of other cations onto the QDs core and enhance the selective binding ability of Hg2+ to dOB coated CdTe QDs (CdTe-dOB QDs). A simple method with high sensitivity and selectivity was developed for the determination of Hg2+ with the CdTe-dOB QDs as fluorescence probe based on the merits of synchronous fluorescence spectroscopy (SFS). When scanning with excitation and emission wavelengths of 250 nm and 470 nm (Delta lambda=lambda(em)-lambda(ex)=220 nm), respectively, the maximum synchronous fluorescence peak of the CdTe-dOB QDs was located at 328 nm. Under optimal conditions, the change of the synchronous fluorescence intensity was in good linear relationship with the Hg2+ concentration in the range of 0.08 x 10(-7) to 30.0 x 10(-7) mol L-1 and the detection limit was 4.2 x 10(-9) mol L-1 (S/N=3). The relative standard deviation of seven replicate measurements for the concentration of 2.0 x 10(-7) mol L-1 and 20.0 x 10(-7) mol L-1 were 2.8% and 2.3%, respectively. Compared with general fluorescence methods, the proposed method, which combined the advantages of high sensitivity of synchronous fluorescence and specific response of Hg2+ to CdTe-dOB, had a wider linear range and higher sensitivity. Furthermore, the proposed method was applied to the determination of trace Hg2+ in water samples with satisfactory results. (C) 2012 Elsevier B.V. All rights reserved.
Language英语
WOS IDWOS:000309785300010
Citation statistics
Cited Times:39[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/118227
Collection中国科学院大连化学物理研究所
Corresponding AuthorLi WY(李文友)
Affiliation1.Nankai Univ, State Key Lab Med Chem Biol, Tianjin 300071, Peoples R China
2.Nankai Univ, Dept Chem, Tianjin 300071, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Chromatog Res & Anal Ctr, Dalian 116011, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yan-Qin,Liu, Yang,He, Xi-Wen,et al. Highly sensitive synchronous fluorescence determination of mercury (II) based on the denatured ovalbumin coated CdTe QDs[J]. TALANTA,2012,99:69-74.
APA Wang, Yan-Qin,Liu, Yang,He, Xi-Wen,Li, Wen-You,Zhang, Yu-Kui,&李文友.(2012).Highly sensitive synchronous fluorescence determination of mercury (II) based on the denatured ovalbumin coated CdTe QDs.TALANTA,99,69-74.
MLA Wang, Yan-Qin,et al."Highly sensitive synchronous fluorescence determination of mercury (II) based on the denatured ovalbumin coated CdTe QDs".TALANTA 99(2012):69-74.
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