Mercury in environmental samples: Speciation, artifacts and validation

Leermakers, Martine; Baeyens, Willy; Quevauviller, Philippe; Horvat, Milena

doi:10.1016/j.trac.2004.01.001

Cited by 410 publications

(192 citation statements)

References 92 publications

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“…Some researchers found that the use of a 15 W UV lamp was more than sufficient to ensure efficient conversion to inorganic mercury in simple solutions [24] and also other studies report that UV treatment permits the release of mercury from CH 3 Hg + [48,38]. Leermakers et al observed that it is possible that UV irradiation does not release CH 3 Hg + quantitatively from complexing substances and an acidification would eliminate this drawback [48].…”

Section: Determination Of Total Mercurymentioning

confidence: 99%

Voltammetric determination of methylmercury and inorganic mercury with an home made gold nanoparticle electrode

et al. 2009

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This study outlines the development of a procedure for the determination of methylmercury by anodic stripping voltammetry at a gold nanoparticle-modified glassy carbon electrode (AuNPs-GCE) and for the differentiation between methylmercury and inorganic mercury. The signal of methylmercury was measured in the square wave mode using HCl as the supporting electrolyte. The procedure had good accuracy, repeatability and linearity. The determination of total mercury in solutions containing both methylmercury and inorganic mercury was performed after converting the former into the inorganic form. Different sample solution pre-treatments were tested for this purpose, and an acid digestion in a microwave oven with HNO 3 and H 2 O 2 was found to be the most effective. The selective determination of methylmercury in the presence of inorganic mercury was possible after masking the latter through reduction to the elemental state with SnCl 2 . The amount of inorganic mercury was determined by difference.

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Section: Determination Of Total Mercurymentioning

confidence: 99%

Voltammetric determination of methylmercury and inorganic mercury with an home made gold nanoparticle electrode

et al. 2009

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“…A number of fluorescence-based probes and sensors for detection of Hg(II) have been reported. [2][3][4][5][6][7][8][9][10] However, many fluorescent small-molecule-based Hg(II) sensors presented to date are quenched upon Hg(II) coordination, often rely on an irreversible Hg(II)-dependent chemical reaction to give fluorescence turn-on, and/or require organic solvent systems. Most of these sensors display drawbacks in terms of actual applicability such as the lack of water solubility, cross-sensitivity toward other metal ions, weak fluorescence enhancement factor, and short emission wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Selective Detection of Mercury (II) Ion Using Nonlinear Optical Properties of Gold Nanoparticles

et al. 2008

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Contamination of the environment with heavy metal ions has been an important concern throughout the world for decades. Driven by the need to detect trace amounts of mercury in environmental samples, this article demonstrates for the first time that nonlinear optical (NLO) properties of MPA-HCys-PDCA-modified gold nanoparticles can be used for rapid, easy and reliable screening of Hg(II) ions in aqueous solution, with high sensitivity (5 ppb) and selectivity over competing analytes. The hyper Rayleigh scattering (HRS) intensity increases 10 times after the addition of 20 ppm Hg 2+ ions to modified gold nanoparticle solution. The mechanism for HRS intensity change has been discussed in detail using particle size-dependent NLO properties as well as a two-state model. Our results show that the HRS assay for monitoring Hg(II) ions using MPAHCys-PDCA-modified gold nanoparticles has excellent selectivity over alkali, alkaline earth (Li + , Na + , K + , Mg 2+ , Ca 2+ ), and transition heavy metal ions (Pb 2+ , Pb + , Mn 2+ , Fe 2+ , Cu 2+ , Ni 2+ , Zn 2+ , Cd 2+ ).

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“…The concentration of a commercial sodium hypochlorite (0.21 mol L −1 ) was determined by iodometric titration (Lagowski 1995). Sodium chloride and EDTA were pro-analysis (Merck, Whitehouse Station, NJ, USA).…”

Section: Methodsmentioning

confidence: 99%

“…The development of analytical methods and lower limits of quantification have allowed increasing the understanding of biogeochemical processes involving mercury and other metals. Among the most popular analytical methods to analyze mercury is the cold vapor atomic fluorescence spectrometry (CVAFS) (Santos et al 2008;Leermakers et al 2005), whose main advantage is separation of the analyte from the matrix by purging the volatile mercury with an inert gas to the detector, with a net result of high sensitivity and selectivity and lower limit of quantification. However, the success of the determination by CVAFS is closely related to the quality of the gas used to purge the analyte, since it is often necessary to make determinations of a few picograms of mercury (Liang et al 1996).…”

Section: Introductionmentioning

confidence: 99%

Removal of traces of mercury from a carrier gas for analytical purpose

et al. 2013

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Background: The analysis of mercury by cold vapor requires a gas, usually argon or helium, to transport elementary mercury to the gold trap or directly to the detector. When analyzing mercury in environmental matrices, a gas with a metal concentration as low as a few picograms per cubic meter is needed. Different sorbents have been used to purify the gas for a long time, but little information is available about them, mainly considering the analytical purpose. This paper presents results of the absorption capacity for solids and hypochlorite solutions that usually are used as mercury sorbents, giving technical information to the analyst to decide the best gas cleaning process to be used. Findings: The absorption capacities of different sorbents were tested using atomic fluorescence spectrometry. Among the tested solids, platinum presented the highest absorption capacity (13.04 pg Hg per gram of Pt). Interaction between sodium hypochlorite, sodium chloride, and EDTA in the absorption capacity was investigated by a 2 3 factorial design. Results showed a significant interaction between hypochlorite and chloride.

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Mercury in environmental samples: Speciation, artifacts and validation

Cited by 410 publications

References 92 publications

Voltammetric determination of methylmercury and inorganic mercury with an home made gold nanoparticle electrode

Voltammetric determination of methylmercury and inorganic mercury with an home made gold nanoparticle electrode

Selective Detection of Mercury (II) Ion Using Nonlinear Optical Properties of Gold Nanoparticles

Removal of traces of mercury from a carrier gas for analytical purpose

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