Determination of methylmercury and inorganic mercury in water samples by slurry sampling cold vapor atomic absorption spectrometry in a flow injection system after preconcentration on silica C18 modified

Segade, Susana Rı́o; Tyson, Julian F.

doi:10.1016/j.talanta.2006.08.006

Cited by 75 publications

(37 citation statements)

References 16 publications

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“…Cold vapor atomic absorption spectrometry (CV-AAS) is the most common technique for trace level determination of mercury: one possibility of using CV-AAS for mercury speciation is based on the different reactivity of mercury species with some reducing agents [22,23].…”

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

et al. 2009

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“…9,[15][16][17][18][20][21][22]24,25,29,33,36 In others, selective retention or elution of mercury species was carried out using different complexing agents or eluting agents for each species. 19,26,28,30,31,34,35 A wide variety of detectors have been used, either for offline preconcentration or online ow injection preconcentration. Ultraviolet detection (UV), ICP-MS and atomic absorption or uorescence spectrometry with cold vapour generation (CV-AAS and CV-AFS) are the most relevant systems of detection reported.…”

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Mercury(ii) and methylmercury determination in water by liquid chromatography hyphenated to cold vapour atomic fluorescence spectrometry after online short-column preconcentration

et al. 2015

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This paper reports a method developed for the simultaneous determination of methylmercury (MeHg + ) and mercury(II) (Hg 2+ ) species in water by liquid chromatography coupled to online UV irradiation and cold vapour atomic fluorescence spectrometry (LC-UV-CV-AFS) after online short-column preconcentration. . The quantification limits (LQs) were 50 ng L À1 for both species. The established analytical online preconcentration method is suitable for the quantification of mercury species in a wide range of environmental waters.

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“…The first is the direct addition of a ligand into the sample and its percolation through the solid phase. 2 The second method requires the immobilization of a ligand on the solid matrix used through a well-defined synthetic procedure. 3 Then, the aqueous sample can be preconcentrated through the synthesized resin.…”

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confidence: 99%

Preconcentration of Total Mercury from River Water by Anion Exchange Mechanism

et al. 2013

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A simple and cheap analytical technique was developed for the measurement of total mercury in river water samples using inductively coupled plasma-mass spectrometry (ICP-MS). It is based on the direct complexation of mercury ions using iodide and a cationic surfactant in water for its subsequent solid-phase extraction. Mercury ions are retained on the silica phase as ion pairs in the presence of iodide ions and dodecyltrimethylammonium bromide. Parameters having influential influence on the retention of Hg(II) were investigated: sample flowrate, eluent type, sample volume, iodide and surfactant concentrations. The retained mercury ions are stripped off from silica phase using 10 mL of 8 mol L -1 HNO3 and quantified by ICP-MS. An enrichment factor of 50 was achieved with a maximum adsorption capacity of 718 μg Hg(II) g -1 . The limit of detection of Hg(II) was 8 pg mL -1 . The developed method was applied for the determination of total mercury in river and tap-water samples.

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Determination of methylmercury and inorganic mercury in water samples by slurry sampling cold vapor atomic absorption spectrometry in a flow injection system after preconcentration on silica C18 modified

Cited by 75 publications

References 16 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

Mercury(ii) and methylmercury determination in water by liquid chromatography hyphenated to cold vapour atomic fluorescence spectrometry after online short-column preconcentration

Preconcentration of Total Mercury from River Water by Anion Exchange Mechanism

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