Naked-eye sensor for rapid determination of mercury ion.

  title={Naked-eye sensor for rapid determination of mercury ion.},
  author={J. Liu and Dapeng Wu and Xiaohui Yan and Y. Guan},
A naked-eye paper sensor for rapid determination of trace mercury ion in water samples was designed and demonstrated. The mercury-sensing rhodamine B thiolactone was immobilized in silica matrices and the silica matrices were impregnated firmly and uniformly in the filter paper. As water samples flow through the filter paper, the membrane color will change from white to purple red, which could be observed obviously with naked eye, when concentration of mercury ions equals to or exceeds 10nM… Expand
Colorimetric and naked eye detection of trace Hg2+ ions in the environmental water samples based on plasmonic response of sodium alginate impregnated by silver nanoparticles.
A new composite nanosensor of sodium alginate- silver nanoparticles (SA-AgNPs) was synthesized by solvent casting method and used in colorimetric and naked eye detection of trace Hg2+ ions in water samples. Expand
Chromatic analysis by monitoring unmodified silver nanoparticles reduction on double layer microfluidic paper-based analytical devices for selective and sensitive determination of mercury(II).
The proposed technique allows a rapid, simple, sensitive and selective analysis of trace mercury(II) in water samples by monitoring the color change of a microfluidic Paper-based Analytical Device. Expand
Colorimetric detection of mercury(II) based on 2,2′-bipyridyl induced quasi-linear aggregation of gold nanoparticles
Abstract Heavy metal mercury(II) (Hg2+) ion is a highly toxic pollution widely distributed in air, water and soil. Simple and reliable on-site detection of Hg2+ has raised considerable concerns forExpand
Fluorescent graphene quantum dot nanoprobes for the sensitive and selective detection of mercury ions.
The constructed sensor with high sensitivity and selectivity, simple, rapid properties makes it valuable for further application. Expand
A single colorimetric sensor for multiple target ions: the simultaneous detection of Fe2+ and Cu2+ in aqueous media
This study demonstrates the design, synthesis and sensing properties of a simple and efficient chemosensor 1 (1 = 2,6-bis((2-(((pyridine-2-yl)methylamino)methyl)phenol)ethylamido)pyridine) to rapidlyExpand
Detection of cyanide ions in aqueous solutions using cost effective colorimetric sensor.
Chemical sensor, S1, having anthraquinone as a signaling unit and thiourea as a binding site, and economically viable paper-based colorimetric "test stripes" of S1 were fabricated to detect the CN̄ ions in 100% aqueous solution. Expand
Novel electrochemical sensing platform for quantitative monitoring of Hg(II) on DNA-assembled graphene oxide with target recycling.
This work designs a new electrochemical sensing platform for the quantitative monitoring of mercury ion (Hg(2+) on poly-T(15) oligonucleotide-functionalized graphene oxide by coupling with DNase I-assisted target recycling amplification by showing high reproducibility and acceptable accuracy. Expand
Gold and silver nanoparticles and indicator dyes as active agents in colorimetric spot and strip tests for mercury(II) ions: a review
AbstractThis review with 111 references covers recent progress made in the field of strip tests and spot tests for quantitative determination of mercury(II) ions. Following an introduction into theExpand
A novel material for the detection and removal of mercury(II) based on a 2,6-bis(2-thienyl)pyridine receptor
Here we report on the strong potential for mercury Hg(II) detection and uptake demonstrated by a 2,6-bis(2-thienyl)pyridine molecular receptor (L). The coordination affinity of L with Hg(II) wasExpand
Solution-based nanosensors for in-field detection with the naked eye.
The main strategies adopted for detecting analytes with the naked eye and at the point of need using plasmonic nanosensors, catalytic nanoparticles and fluorescent nanomaterials are reviewed. Expand


Dispersive liquid-liquid microextraction of trace Hg2+ for visual and fluorescence test.
In this work, trace Hg(2+) in environmental water samples was first preconcentrated by dispersive liquid-liquid microextraction (DLLME), and then was colorated by one common rhodamine B thiolactoneExpand
Visual and on-site detection of mercury(II) ions on lateral flow strips using DNA-functionalized gold nanoparticles.
A test strip for detection of Hg(2+) in aqueous solution based on the DNA-functionalized gold nanoparticles (DNA-AuNPs) has excellent sensitivity and selectivity and holds a great potential for rapid, on-site and real time detection. Expand
Highly sensitive and selective fiber-optic modal interferometric sensor for detecting trace mercury ion in aqueous solution
A novel type of fiber-optic mercury ion (Hg2+) sensor was prepared by coating poly (N-ethyl-4-vinylpyridinium chloride) (P4VP·HCl) and poly (sodium-p-styrenesulfonate) (PSS) ultrathin film on theExpand
Gold nanoparticle probes for the detection of mercury, lead and copper ions.
The roles of several factors affecting the selectivity and sensitivity of the nanosensors toward the analytes are discussed: the size of the Au nanomaterial, the length and sequence of the DNA or the nature of the thiol, the surface density of the recognition ligand, the ionic strength and pH of the buffer solution. Expand
A competitive immunochromatographic assay based on a novel probe for the detection of mercury (II) ions in water samples.
A novel probe with high selectivity towards Hg(2+) was synthesized and a one step competitive immunochromatographic assay based on the probe for the detection of Hg (2+) was developed and applied for water samples and found to be rapidity, low cost and without the need of any equipment and complicated sample preparation. Expand
Trace determination of mercury by anodic stripping voltammetry at the rotating gold electrode
Abstract A simple and highly reliable method for the determination of mercury on a rotating gold disk electrode is reported. The signal is linear with concentration over a wide concentration rangeExpand
Voltammetric determination of mercury (II) in aqueous media using glassy carbon electrodes modified with novel calix[4]arene.
The proposed method was successfully applied to determine mercury in natural water by coating a novel calix[4]arene derivative containing benzothiazole group on glassy carbon electrode (GCE) and applying to the recognition of mercury ion. Expand
Rapid sensing of molybdenum by combined colorimetric solid-phase extraction―Reflectance spectroscopy
Abstract A new and selective colorimetric solid-phase extraction (C-SPE) procedure for the determination of Mo(VI) in aqueous samples is proposed. Phenylhydrazine (PHZ) was used as a coloring reagentExpand
Colorimetric filtrations of metal chelate precipitations for the quantitative determination of nickel(II) and lead(II).
A colorimetric filtration method has been developed for the highly selective and sensitive determination of Ni( 2+) and Pb(2+) ions, using nioxime and rhodizonic acid disodium salt as colorIMetric reagents. Expand
A test strip platform based on DNA-functionalized gold nanoparticles for on-site detection of mercury (II) ions.
The method developed could be a potential on-site screening tool for the rapid detection of Hg(2+) in different water samples without special instrumentation and under optimized conditions, the detection limit for Hg (2+) was 3 nM, which is lower than the maximum contaminant limit defined by the US Environmental Protection Agency for drinking water. Expand