Determination of Hg(II) in Environmental Water Samples by Dispersive Liquid Phase Microextraction Combined with Flame Atomic Absorption Spectrometry

Bahar, Soleiman; Zakerian, Razieh

doi:10.1002/jccs.201200218

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…In recent years, different microextraction techniques coupled with atomic absorption spectrometry have been used for the determination of Hg(II) [15][16][17]; however, very few works are found in the literature in which the speciation of mercury and its subsequent quantification are carried out [18]. Moreover, the analysis of MeHg in water samples is usually carried out using chromatographic techniques, although a derivatizing treatment of the sample is required [19,20].…”

Section: Introductionmentioning

confidence: 99%

Determination of Hg(II) and Methylmercury by Electrothermal Atomic Absorption Spectrometry after Dispersive Solid-Phase Microextraction with a Graphene Oxide Magnetic Material

et al. 2022

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The toxicity of all species of mercury makes it necessary to implement analytical procedures capable of quantifying the different forms this element presents in the environment, even at very low concentrations. In addition, due to the assorted environmental and health consequences caused by each mercury species, it is desirable that the procedures are able to distinguish these forms. In nature, mercury is mainly found as Hg0, Hg2+ and methylmercury (MeHg), with the latter being rapidly assimilated by living organisms in the aquatic environment and biomagnified through the food chain. In this work, a dispersive solid-phase microextraction of Hg2+ and MeHg is proposed using as the adsorbent a magnetic hybrid material formed by graphene oxide and ferrite (Fe3O4@GO), along with a subsequent determination by electrothermal atomic absorption spectrometry (ETAAS). On the one hand, when dithizone at a pH = 5 is used as an auxiliary agent, both Hg(II) and MeHg are retained on the adsorbent. Next, for the determination of both species, the solid collected by the means of a magnet is suspended in a mixture of 50 µL of HNO3 (8% v/v) and 50 µL of H2O2 at 30% v/v by heating for 10 min in an ultrasound thermostatic bath at 80 °C. On the other hand, when the sample is set at a pH = 9, Hg(II) and MeHg are also retained, but if the solid collected is washed with N-acetyl-L-cysteine only, then the Hg(II) remains on the adsorbent, and can be determined as indicated above. The proposed procedure exhibits an enrichment factor of 49 and the determination presents a linear range between 0.1 and 10 µg L−1 of mercury. The procedure has been applied to the determination of mercury in water samples from different sources.

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Section: Introductionmentioning

confidence: 99%

Determination of Hg(II) and Methylmercury by Electrothermal Atomic Absorption Spectrometry after Dispersive Solid-Phase Microextraction with a Graphene Oxide Magnetic Material

et al. 2022

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“…11−14 Several solvent microextraction methods for mercury determination have been reported. These include * Correspondence: jana.skrlikova@googlemail.com dispersive liquid-liquid microextraction (DLLME), 15,16 ionic liquid-based dispersive liquid-liquid microextraction (IL-DLLME), 17 dispersive liquid-liquid microextraction based on solidification of floating organic drop (DLLME-SFO), 18 surfactant-assisted dispersive liquid-liquid microextraction based on the solidification of the floating organic drop (SA-DLLME-SFO), 19 one-step displacement dispersive liquid-liquid microextraction (D-DLLME), 20 dispersive liquid-phase microextraction (DLPME), 21 task-specific ionic liquid-based ultrasoundassisted dispersive liquid-phase microextraction (UA-IL-DLPME), 22 and ionic liquid-based vortex assisted liquid-liquid microextraction (IL-VALLME) 23 coupled with a variety of spectrometric detection techniques, such as graphite furnace atomic absorption spectrometry (GFAAS), 18−20 flame atomic absorption spectrometry (FAAS), 21 cold vapor atomic absorption spectrometry (CV-AAS), 15,22 flow injection-hydride generation/cold vapor atomic absorption spectroscopy (FI-HG/CV-AAS), 17 cold vapor atomic fluorescence spectroscopic detection (CV-AFS), 23 and inductively coupled plasma atomic emission spectrometry (ICP-AES). 16 Besides the above-mentioned spectrometric detection techniques, the combination of DLLME, 24,25 IL-DLLME, 26−28 VALLME, 29 and IL-VALLME 30 with various chromatographic techniques, such as HPLC-ICP-MS, 24,26 HPLC-UV, 27 HPLC-CV-AFS, 29,30 HPLC-HG-AFS, 28 and GC-FID, 25 has also been described.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric determination of mercury using vortex-assisted liquid--liquid microextraction

Antolova¹,

Zaruba²,

Šandrejová³

et al. 2016

Turk J Chem

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A novel method for the determination of mercury(II) is suggested. The procedure is based on the formation of an ion associate between the bromide complex of Hg(II) and Astrazon Red 6B dye and vortex-assisted liquid-liquid microextraction of the ion associate formed, with subsequent spectrophotometric detection. The variables that affect the procedure, such as pH, the concentration of ligand and dye, the type and volume of extraction solvent, and the rate and time of vortex mixing, were optimized. Under optimum conditions (pH 2.0, 0.01 mol L −1 KBr, 2 × 10 −4 mol L −1 AR6B, 50 µ L of the extraction mixture toluene:dichlorethane, 4:1, v:v, vortex mixing for 100 s at 1600 rpm) the linear range was 8 to 200 µ g L −1 Hg(II), with the limit of detection at 1.5 µ g L −1. The method was applied to the determination of mercury in water samples.

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Removal of Mercury Using Novel Lamella Carbonate Sorbent at Elevated Temperature Conditions

Cheng

Chen

2014

J Chinese Chemical Soc

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Carbonaceous fuel combustion has increased such that approximately 80% of current global Hg emissions originate from anthropogenic sources, particularly from coal‐fired plants and incinerators. Accordingly, the development of effective Hg scrubbing methods that enable cleaner industrial processes is of great significance to human health. Because of the weak physical adsorption of Hg at ambient temperatures, numerous sorbents are required for its removal via processes such as electrostatic precipitation, selective catalytic reduction, flue gas desulfurization, and activated carbon injection. Alternatively, capturing Hg at elevated temperatures has numerous advantages such as high capacity and the avoidance of the diffusion of Hg species throughout the process. Herein, we report the preparation of a novel sorbent with a layered structure, (Mg3‐x, Mx)‐Al‐CO3, via the coprecipitation of Mg2+, M2+, and Al3+ in an alkaline solution of NaOH/Na2CO3, where M2+ = Cu2+ or Zn2+. In a fixed‐bed reactor, the Hg removal rate R notably increased at elevated temperatures (200‐300 °C) and was enhanced by a factor of 10 via the incorporation of M2+ in Mg‐Al‐CO3. These results demonstrate the potential of such synthetic Hg sorbents under medium‐high temperature conditions.

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Determination of Hg(II) in Environmental Water Samples by Dispersive Liquid Phase Microextraction Combined with Flame Atomic Absorption Spectrometry

Cited by 5 publications

References 32 publications

Determination of Hg(II) and Methylmercury by Electrothermal Atomic Absorption Spectrometry after Dispersive Solid-Phase Microextraction with a Graphene Oxide Magnetic Material

Determination of Hg(II) and Methylmercury by Electrothermal Atomic Absorption Spectrometry after Dispersive Solid-Phase Microextraction with a Graphene Oxide Magnetic Material

Spectrophotometric determination of mercury using vortex-assisted liquid--liquid microextraction

Removal of Mercury Using Novel Lamella Carbonate Sorbent at Elevated Temperature Conditions

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