Colorimetric detection of Cd2+ using gold nanoparticles cofunctionalized with 6-mercaptonicotinic acid and l-Cysteine

Xue, Ying; Zhao, Hong; Wu, Zhijiao; Li, Xiangjun; He, Yi; Yuan, Zhiwen

doi:10.1039/c1an15238f

Cited by 112 publications

(68 citation statements)

References 41 publications

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“…However, Pb 2+ and Cu 2+ show interference with the detection of Cd 2+ . 19 A new test paper for the colorimetric immunosensing Cd 2+ has been constructed by using the Cd 2+ -ethylenediaminetetraacetic acid-bovine serum albumin-AuNPs conjugate. The test paper can be successfully used to detect Cd 2+ in drinking and tap water with almost 100% accuracy.…”

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confidence: 99%

Label-Free Colorimetric Detection of Cadmium Ions in Rice Samples Using Gold Nanoparticles

et al. 2014

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A simple and label-free colorimetric method for cadmium ions (Cd 2+ ) detection using unmodified gold nanoparticles (AuNPs) is reported. The unmodified AuNPs easily aggregate in a high concentration of NaCl solution, but the presence of glutathione (GSH) can prevent the saltinduced aggregation of AuNPs. When Cd 2+ is added to the stable mixture of AuNPs, GSH, and NaCl, Cd 2+ can coordinate with 4× GSH as a spherical shaped complex, which decreases the amount of free GSH on the surface of gold nanoparticles to weaken the stability of AuNPs, and AuNPs will easily aggregate in high-salt conditions. On the basis of the mechanism, we design a simple, label-free colorimetric method using AuNPs accompanied by GSH in a high-salt environment to detect Cd 2+ in water and digested rice samples.A s an important natural element, cadmium is widely used in many fields, such as industry, agriculture, and so on. 1 However, chronic exposure of Cd 2+ has caused many serious environmental and health problems, including renal dysfunction, reduced lung capacity, and some cancers. 2,3 In 2013, the government test indicated that some rice samples in South China were contaminated with cadmium. In China, the maximum permitted concentration for cadmium in rice has been set at a level of 0.2 mg/kg, 4 which is lower than the standard of Codex Alimentarius Commission (CAC), but these events are people alarming. Thus, sensitive sensing cadmium in rice is of considerable significance for food safety and human health. Though many methods for Cd 2+ detection have been developed, these methods either are time-consuming or require costly instruments and complicated operation. 5−9 To satisfy the requirement of an on-site and quick testing, a facile, simple, and on-site method for monitoring Cd 2+ is, therefore, still required.Nowadays, many colorimetric detection methods based on gold nanoparticles (AuNPs) or silver nanoparticles have been well developed because these nanoparticles have extremely high extinction coefficients and strong distance-dependent optical properties. 10−17 However, there are very few colorimetric methods for Cd 2+ detection, and the selectivity and sensitivity of those detection methods of Cd 2+ is not sufficiently good for real-world applications. 18−23 For example, a colorimetric method for Cd 2+ detection is developed with triazole-ester modified silver nanoparticles. This method suffers from complex organic synthesis, long response time, and poor sensitivity. 18 AuNPs cofunctionalized with 6-mercaptonicotinic acid and L-cysteine can sense Cd 2+ with a visible color change. However, Pb 2+ and Cu 2+ show interference with the detection of Cd 2+ . 19 A new test paper for the colorimetric immunosensing Cd 2+ has been constructed by using the Cd 2+ -ethylenediaminetetraacetic acid-bovine serum albumin-AuNPs conjugate. The test paper can be successfully used to detect Cd 2+ in drinking and tap water with almost 100% accuracy. However, the practical application is not included in this paper. 22 A new colorimetric met...

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Label-Free Colorimetric Detection of Cadmium Ions in Rice Samples Using Gold Nanoparticles

et al. 2014

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“…Noble metal nanomaterials (e.g., Au and Ag) have been commonly used to develop highly sensitive colorimetric probes for the determination of biomolecules 21,22 , drugs 23 , toxicants [24][25][26][27][28] and small molecules [29][30][31] due to their optical and electrical properties and biocompatibility 32,33 . Ag nano materials are more cost effective in their preparation than Au nano materials.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles-Based Nano-drop Spectrophotometric Determination of Cationic Surfactants Coupled with Hydrophobic Interaction; An Application to Pharmaceuticals and Environmental

Sharma¹,

Tapadia²

2016

Orient. J. Chem

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The proposed work describes the nanodrop spectrophotometric determination of cationic surfactants using citrate-modified silver nanoparticles based on the aggregation of silver nanoparticles induced by cationic surfactants due to the hydrophobic effect. The visible color change in the solution of silver nanoparticle includes a red shift with the quenching of the absorption spectra. The maximum absorbance was measured at wavelength, λ max 400 nm. The concentrations of cationic surfactants were determined using a nanodrop spectrophotometer with limits of detection of 15.0, 8.0, 6.0, 5.8, and 13.0 µM for dodecyl trimethyl ammonium bromide, myristil trimethyl ammonium bromide, cetrimonium trimethyl ammonium bromide, cetyl pyridinium chloride and benzalkonium chloride, respectively. The proposed method was successfully applied for the determination of cetyl pyridinium chloride in commercial mouthwasher, gum astringent and nasal spray pharmaceuticals and environmental samples.

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“…Again the observable limits are compared to the recommended limits in Table 2. Fe(II) does not have a recommended limit as Fe(II) salts in drinking water are insoluble and therefore precipitate out as 15 insoluble Fe(III) hydroxide. 35 From the comparisons shown in the table, it is evident that the levels for Cd(II) and Cr(III) would also have to be improved to meet WHO limits.…”

Section: Concentration Relationshipsmentioning

confidence: 99%

“…27 Briefly, 90 mg of silver nitrate, dissolved in 10 mL water, was added to 500 mL of water and heated to boiling under vigorous stirring. A 1% aqueous solution of sodium citrate was added slowly and the solution boiled for a further 20 -30 min before being left to cool to room 15 temperature.…”

Section: Nanoparticle Synthesis and Characterisationmentioning

confidence: 99%

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Determination of metal ion concentrations by SERS using 2,2′-bipyridyl complexes

Docherty

Mabbott

Smith

et al. 2015

Analyst

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This version is available at https://strathprints.strath.ac.uk/54140/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output.Journal Name Surface enhanced Raman scattering (SERS) can generate characteristic spectral "fingerprints" from metal complexes, thus providing the potential for the development of methods of analysis for the identification and quantitation of a range of metal ions in solution. The advantages include sensitivity and the use of one ligand for several metals without the need for a specific chromophore. Aqueous solutions of Fe(II), Ni(II), 10Zn(II), Cu(II), Cr(III) and Cd(II) in the presence of excess 2,2'-bipyridyl (bipy) were analysed using SERS. Specific marker bands enabled the identification of each metal ion and the limit of detection for each metal ion was estimated. Two of the ions, Zn(II) and Cu(II), could be detected below the World Health Organisation's (WHO) recommended limits for drinking water at levels of 0.22 and 0.6 mg L -1 , respectively.

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Colorimetric detection of Cd2+ using gold nanoparticles cofunctionalized with 6-mercaptonicotinic acid and l-Cysteine

Cited by 112 publications

References 41 publications

Label-Free Colorimetric Detection of Cadmium Ions in Rice Samples Using Gold Nanoparticles

Label-Free Colorimetric Detection of Cadmium Ions in Rice Samples Using Gold Nanoparticles

Silver Nanoparticles-Based Nano-drop Spectrophotometric Determination of Cationic Surfactants Coupled with Hydrophobic Interaction; An Application to Pharmaceuticals and Environmental

Determination of metal ion concentrations by SERS using 2,2′-bipyridyl complexes

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