| Gold Nanoparticle-based Colorimetric Assay for Determination of Lead(Ⅱ) in Aqueous Media |
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| 作者单位： | LI Xiao-kun(Graduate School of the Chinese Academy of Sciences,Beijing 100049,P.R.China);WANG Zhen-xin(Graduate School of the Chinese Academy of Sciences,Beijing 100049,P.R.China;State,Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,P.R.China) |
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| 基金项目： | Supported by the National Natural Science Foundation of China(No.20675080);;the Program of Chinese Academy of Sciences Hundred Talents(No.KJCX2-YW-H11) |
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| 摘 要： | The authors presented a simple colorimetric assay for the detection of toxic heavy metal lead(Ⅱ) ion(Pb2+).Pentapeptide,cysteine-alanine-leacine-asparagine-asparagine(CALNN),functionalized gold nanoparticles(GNPs) were aggregated in the presence of the divalent metal ion in solution by an ion-templated chelation process,which caused an easily measurable change in the absorption spectrum of the particles.Typically,mono-dispersing GNPs exhibit an absorption band at 522 nm,corresponding to a red color solution,while aggregated GNPs have it at longer wavelengths,corresponding to a purple or blue color solution.The chelation/aggregation process is reversible via the addition of a strong metal ion chelator such as EDTA.Highly selective and sensitive detection of Pb2+ in aqueous solution is thus provided.A detection limit of 0.1 μmol/L of Pb2+ was demonstrated.
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| 关 键 词： | Gold nanoparticle Peptide Colorimetric assay Lead（Ⅱ） |
Gold Nanoparticle-based Colorimetric Assay for Determination of Lead(Ⅱ) in Aqueous Media |
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| Authors: | LI Xiao-kun WANG Zhen-xin |
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| Institution: | [1]State Key Laboratory of Electroanalytical Chemistry, Changehun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, R R. China [2]Graduate School of the Chinese Academy ofScienees, Beoing 100049, P. R. China |
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| Abstract: | |
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| Keywords: | Gold nanoparticle Peptide Colorimetric assay |
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