Nanogold-Decorated Silica Monoliths as Highly Efficient Solid-Phase Adsorbent for Ultratrace Mercury Analysis in Natural Waters

Huber, Jessica; Heimbürger, Lars-Éric; Sonke, Jeroen E.; Ziller, Sebastian; Lindén, Mika

doi:10.1021/acs.analchem.5b03303

Cited by 22 publications

(6 citation statements)

References 34 publications

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“…It is well-known that the toxicity and bioavailability of mercury are strongly dependent on its chemical forms. , Previous works − revealed that about 95% methylmercury (MeHg) is accumulated in humans regardless of the route of exposure because it could readily cross biological barriers, whereas only 10% inorganic mercury (IHg) was remained. Recently, the mercury distribution in fish was found to be not only dependent on its chemical forms but also organ dependent. − MeHg is generally accumulated and permanently stored in muscle and brain, however, IHg is inclined to be accumulated in detoxification organs (liver and kidney).…”

mentioning

confidence: 99%

Single-Drop Solution Electrode Discharge-Induced Cold Vapor Generation Coupling to Matrix Solid-Phase Dispersion: A Robust Approach for Sensitive Quantification of Total Mercury Distribution in Fish

et al. 2017

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Sensitive quantification of mercury distribution in fish is challenging because of insufficient sensitivities of conventional analytical methods, the limited mass of organs (tens of micrograms to several milligrams), and dilution of analyte concentration from sample digestion. In this work, a simple and robust approach coupling multiwall carbon nanotubes assisted matrix solid-phase dispersion (MWCNTs-MSPD) to single-drop solution electrode glow discharge-induced cold vapor generation (SD-SEGD-CVG) was developed for the sensitive determination of mercury in limited amount of sample. Mercury species contained in a limited amount of sample can be efficiently extracted into a 100 μL of eluent by MWCNTs-MSPD, which are conveniently converted to Hg by SD-SEGD-CVG and further transported to atomic fluorescence spectrometry for their determination. Therefore, analyte dilution resulted from sample preparation is avoided and sensitivity is significantly improved. On the basis of consumption of 1 mg of sample, a limit of detection of 0.01 μg L (0.2 pg) was obtained with relative standard deviations (RSDs) of 5.2% and 4.6% for 2 and 20 μg L, respectively. The accuracy of the proposed method was validated by analysis of three Certified Reference Materials with satisfying results. To confirm that SD-SEGD-CVG-AFS coupling to MWCNTs-MSPD is a promising method to quantify mercury distribution in fish, this method was successfully applied for the sensitive determination of mercury in seven organs of common carps (muscle, gill, intestine, liver, gallbladder, brain, and eye) after dietary of mercury species. The proposed method provides advantages of minimum sample dilution, low blank, high sample introduction efficiency, high sensitivity, and minimum toxic chemicals and sample consumption.

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confidence: 99%

Single-Drop Solution Electrode Discharge-Induced Cold Vapor Generation Coupling to Matrix Solid-Phase Dispersion: A Robust Approach for Sensitive Quantification of Total Mercury Distribution in Fish

et al. 2017

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“…需要指出的是, 这些纳米材料在 SPE 中除了以填充固相萃取柱的方式进行操作之外, 还可以将其负载在不同的载体(如活性碳 [23] 、SiO 2 整体柱 [24] 、纳米滤膜 [25] 等)上, 实现待测元素的分离/富集. 这种被负载的金属纳米粒子包括 Au、Ag、Pd、Fe 等纳米粒子 [24~27] .…”

Section: 粉体纳米粒子unclassified

Nanomaterials-based solid phase extraction for the separation/ preconcentration of trace elements and their species

He¹,

Huang²,

Chen³

et al. 2016

Sci. Sin.-Chim

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Nanomaterials, featuring with small size, easy preparation, high surface area and strong adsorption capacity, have become a kind of good adsorbents with extensive application potential for trace elements analysis and their speciation. Herein, the recent progress and advances in designing nanostructured solid phase extraction adsorbents based on various dimensions and their applications in trace elemental analysis and their speciation is reviewed, including zero dimensional nanomaterials (e.g. nanoparticles, mesoporous nanoparticles, magnetic nanoparticles, fullerenes), one dimensional nanomaterials (e.g. carbon nanotubes, inorganic nanotubes, nanowires), two dimensional nanomaterials (e.g. nanofibers, graphene/graphene oxide, layered double hydroxide) and three dimensional nanomaterials (e.g. nanoflowers, dendritic polymers). To further improve the selectivity, adsorption capacity and the application potential in direct sample analysis, some other novel nanometer materials, including ion imprinting materials, metal-organic frameworks and restricted access materials, are also developed and employed for the analysis of trace elements and their species in environmental and biological samples.

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“…First approaches using immobilized AuNPs onto different support materials, as reported by the authors, showed very promising analytical performance. However, at the same time, poor mechanical stability and limited lifetime were observed [32,33]. Therefore, the development of a more sophisticated structure of the active film covered by a protective layer was necessary.…”

Section: Introductionmentioning

confidence: 99%

Photoactive Titanium Dioxide Films with Embedded Gold Nanoparticles for Quantitative Determination of Mercury Traces in Humic Matter-Containing Freshwaters

2021

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Mercury detection in humic matter-containing natural waters is often associated with environmental harmful substances for sample preparation. Herein we report an approach based on photoactive titanium dioxide films with embedded gold nanoparticles (AuNP@TiO2 dipstick) for chemical-free sample preparation and mercury preconcentration. For this purpose, AuNPs are immobilized onto a silicon wafer and further covered with a thin photoactive titanium dioxide layer. The AuNPs allow the preconcentration of Hg traces via amalgamation, while TiO2 acts as a protective layer and, at the same time, as a photocatalyst for UV-C radiation-based sample pretreatment. Humic matter, often present in natural waters, forms stabile complexes with Hg and so hinders its preconcentration prior to detection, causing a minor recovery. This problem is solved here by irradiation during Hg preconcentration onto the photoactive dipstick, resulting in a limit of detection as low as 0.137 ng L−1 using atomic fluorescence spectrometry (AFS). A 5 min preconcentration step is sufficient to obtain successful recovery of Hg traces from waters with up to 10 mg L−1 DOC. The feasibility of the approach was demonstrated by the determination of Hg traces in Danube river water. The results show no significant differences in comparison with standard cold vapor-atomic fluorescence spectrometry (CV-AFS) measurements of the same sample. Hence, this new AuNP@TiO2 dipstick provides a single-step sample preparation and preconcentration approach that combines sustainability with high analytical sensitivity and accuracy.

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Nanogold-Decorated Silica Monoliths as Highly Efficient Solid-Phase Adsorbent for Ultratrace Mercury Analysis in Natural Waters

Cited by 22 publications

References 34 publications

Single-Drop Solution Electrode Discharge-Induced Cold Vapor Generation Coupling to Matrix Solid-Phase Dispersion: A Robust Approach for Sensitive Quantification of Total Mercury Distribution in Fish

Single-Drop Solution Electrode Discharge-Induced Cold Vapor Generation Coupling to Matrix Solid-Phase Dispersion: A Robust Approach for Sensitive Quantification of Total Mercury Distribution in Fish

Nanomaterials-based solid phase extraction for the separation/ preconcentration of trace elements and their species

Photoactive Titanium Dioxide Films with Embedded Gold Nanoparticles for Quantitative Determination of Mercury Traces in Humic Matter-Containing Freshwaters

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