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Highly sensitive, colorimetric detection of mercury(II) in aqueous media by quaternary ammonium group-capped gold nanoparticles at room temperature
- Source :
- Analytical Chemistry. Dec 1, 2010, Vol. 82 Issue 23, p9606, 5 p.
- Publication Year :
- 2010
-
Abstract
- We provide a highly sensitive and selective assay to detect [Hg.sup.2+] in aqueous solutions using gold nanoparticles modified with quaternary ammonium group-terminated thiols at room temperature. The mechanism is the abstraction of thiols by [Hg.sup.2+] that led to the aggregation of nanoparticles. With the assistance of solar light irradiation, the detection limit can be as low as 30 nM, which satisfies the guideline concentration of [Hg.sup.2+] in drinking water set by the WHO. In addition, the dynamic range of detection is wide (3 x [10.sup.-8]-1 x [10.sup.-2] M). This range, to our best knowledge, is the widest one that has been reported so far in gold nanoparticle (AuNP)-based assays for [Hg.sup.2+]. 10.1021/ac1021503
- Subjects :
- Nanoparticles -- Usage
Nanoparticles -- Composition
Nanoparticles -- Thermal properties
Gold -- Usage
Gold -- Atomic properties
Gold -- Thermal properties
Ammonium chloride -- Usage
Ammonium chloride -- Atomic properties
Ammonium chloride -- Thermal properties
Ammonium compounds -- Usage
Ammonium compounds -- Atomic properties
Ammonium compounds -- Thermal properties
Ammonium paratungstate -- Usage
Ammonium paratungstate -- Atomic properties
Ammonium paratungstate -- Thermal properties
Colorimetry -- Methods
Mercury -- Chemical properties
Mercury -- Identification and classification
Solution (Chemistry) -- Chemical properties
Solution (Chemistry) -- Composition
Chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 00032700
- Volume :
- 82
- Issue :
- 23
- Database :
- Gale General OneFile
- Journal :
- Analytical Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.245167176