Au nanoparticles as a novel coating for solid-phase microextraction

Feng, Juanjuan; Sun, Min; Liu, Hongmei; Li, Jubai; Liu, Xia; Jiang, Shengxiang

doi:10.1016/j.chroma.2010.10.089

Cited by 135 publications

(86 citation statements)

References 40 publications

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“…Table 1. Characteristic data of the established GO/SPME-GC method for determination of six PAHs and compared with other methods Compound As-prepared GO/fiber LOD (ng/L) with commercial fiber [39] LOD of PPy-DS fiber [40] (ng/L) LOD of TiO 2 nanotube array/Ti wire [22] (ng/L) LOD of Au NPs/SPME fiber [34] Linear range …”

Section: Stabilitymentioning

confidence: 99%

“…By incorporating phenyl groups into sol-gel solutions, Bianchi and co-workers improved the extraction of PAHs in terms of extraction efficiency, thermal and chemical stability [33]. Coupled with GC-FID, Jiang's group reported the extraction of four PAHs using TiO 2 nanotubes and Au nanoparticles as SPME coating materials with detection limits of 10-100 ng/L and 25-250 ng/L, respectively [22,34]. Carbon nanotubes were also reported to exhibit higher extraction efficiency than the commercial PDMS coating in the extraction of PAHs [35].…”

Section: Introductionmentioning

confidence: 99%

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Graphene oxide bonded fused‐silica fiber for solid‐phase microextraction‐gas chromatography of polycyclic aromatic hydrocarbons in water

Feng

et al. 2011

J of Separation Science

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A novel chemically bonded graphene oxide/fused-silica fiber was prepared and applied in solid-phase microextraction of six polycyclic aromatic hydrocarbons from water samples coupled with gas chromatography. It exhibited high extraction efficiency and excellent stability. Effects of extraction time, extraction temperature, ionic strength, stirring rate and desorption conditions were investigated and optimized in our work. Detection limits to the six polycyclic aromatic hydrocarbons were less than 0.08 μg/L, and their calibration curves were all linear (R(2)≥0.9954) in the range from 0.05 to 200 μg/L. Single fiber repeatability and fiber-to-fiber reproducibility were less than 6.13 and 15.87%, respectively. This novel fiber was then utilized to analyze two real water samples from the Yellow River and local waterworks, and the recoveries of samples spiked at 1 and 10 μg/L ranged from 84.48 to 118.24%. Compared with other coating materials, this graphene oxide-coated fiber showed many advantages: wide linear range, low detection limit, and good stability in acid, alkali, organic solutions and at high temperature.

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Section: Stabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Graphene oxide bonded fused‐silica fiber for solid‐phase microextraction‐gas chromatography of polycyclic aromatic hydrocarbons in water

Feng

et al. 2011

J of Separation Science

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“…Here, we demonstrate for the first time the utilization of bare (citrate stabilized) GNPs immobilized on the sol-gel-pretreated fused-silica (FS) capillary wall in the RP mode for the separation of both hydrophobic polyaromatic hydrocarbons (PAH) (naphthalene, fluorene, phenanthrene, and anthracene) and hydrophilic biologically active cationic peptides, analogues of antimicrobial peptide mastoparan PDD-B (tetradecapeptide While the use of bare GNPs for the preconcentration of various compounds has been successfully demonstrated elsewhere [11,18,19], to the best of our knowledge, the separations utilizing bare GNPs immobilized on pretreated sol-gel FS capillary as the stationary phase in OT-CEC mode is described for the first time in this study. …”

Section: Introductionmentioning

confidence: 99%

“…Moreover, derivatized gold microspheres [15] and goldcoated polystyrene [16] and silica [17] particles as the capillary column packing have been employed in HPLC mode. Lately, also the potential of the GNPs for sample preconcentration has been distinguished and this area undergoes a dynamic progress [18,19]. Recently, several detailed review papers devoted specifically to the applications of GNPs in separation science have been published [20,21].…”

Section: Introductionmentioning

confidence: 99%

Application of bare gold nanoparticles in open‐tubular CEC separations of polyaromatic hydrocarbons and peptides

Řezanka

Ehala

Koktan

et al. 2011

J of Separation Science

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In this study, bare gold nanoparticles (GNPs) immobilized in the sol-gel-pretreated fused-silica (FS) capillary as a stationary phase for open-tubular capillary electrochromatography (OT-CEC) are for the first time shown to be able to separate both hydrophobic polyaromatic hydrocarbons (PAHs) as well as hydrophilic cationic antimicrobial peptides. Model mixture of four PAHs, naphthalene, fluorene, phenanthrene, and anthracene, was resolved by OT-CEC in the GNP-modified FS capillaries using the hydro-organic background electrolyte (BGE) composed of 20 mmol/L sodium phosphate buffer, pH 7, modified with ACN at 8:2 v/v ratio. On the other hand, three synthetic analogues of an antimicrobial peptide mastoparan PDD-B, basic tetradecapeptides INWKKLGKKILGAL-NH(2), INSLKLGKKILGAL-NH(2) and NWLRLGRRILGAL-NH(2), were separated in aqueous acidic BGEs, pH 2.1-3.1, composed of weak acids (formic and acetic) or amphoteric amino or imino acids (aspartic or iminodiacetic), utilizing the advantage of a slow reversed (anodic) EOF and slightly positive charge of the GNP-modified FS capillary suppressing the adsorption of cationic peptides on the inner capillary wall and improving their resolution.

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“…[21]. First, 60 mL of 0.01% w/w HAuCl 4 aqueous solution was added into a roundbottomed flask and brought to a vigorous boil under constant stirring.…”

Section: Synthesis Of Gnpsmentioning

confidence: 99%

Gold nanoparticle decorated graphene oxide/silica composite stationary phase for high-performance liquid chromatography

et al. 2014

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In the initial phase of this study, graphene oxide (GO)/silica was fabricated by assembling GO onto the silica particles, and then gold nanoparticles (GNPs) were used to modify the GO/silica to prepare a novel stationary phase for high-performance liquid chromatography. The new stationary phase could be used in both reversed-phase chromatography and hydrophilic interaction liquid chromatography modes. Good separations of alkylbenzenes, isomerides, amino acids, nucleosides, and nucleobases were achieved in both modes. Compared with the GO/silica phase and GNPs/silica phase, it is found that except for hydrophilicity, large π-electron systems, hydrophobicity, and coordination functions, this new stationary phase also exhibited special separation performance due to the combination of 2D GO with zero-dimensional GNPs.

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Au nanoparticles as a novel coating for solid-phase microextraction

Cited by 135 publications

References 40 publications

Graphene oxide bonded fused‐silica fiber for solid‐phase microextraction‐gas chromatography of polycyclic aromatic hydrocarbons in water

Graphene oxide bonded fused‐silica fiber for solid‐phase microextraction‐gas chromatography of polycyclic aromatic hydrocarbons in water

Application of bare gold nanoparticles in open‐tubular CEC separations of polyaromatic hydrocarbons and peptides

Gold nanoparticle decorated graphene oxide/silica composite stationary phase for high-performance liquid chromatography

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