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

Carneado, S.; Peró-Gascón, Roger; Ibáñez-Palomino, Carmen; López-Sánchez, José Fermı́n; Sahuquillo, A.

doi:10.1039/c4ay02929a

Cited by 20 publications

(9 citation statements)

References 34 publications

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“…147 The water samples were preserved upon collection with HCl, to give a pH < 4, and were directly injected onto a C 18 (1.6 mm Â 150 mm Â 5 mm) column tted with a 5 mm C 18 guard column. 149 In this work the sample loop of an injection valve was replaced by a short C 18 column (4.6 mm ID, 5 mm particle size) of 10, 20 or 50 mm in length for sample pre-concentration, whilst a second valve with a conventional sample loop was used to for calibration standards, before elution to an analytical C 18 column (250 mm Â 4.6 mm id, 5 mm). 2-mercaptoethanol to produce ethylmercury thioethanoate and thiosalicylic acid.…”

Section: Mercurymentioning

confidence: 99%

Atomic Spectrometry Update: review of advances in elemental speciation

Clough

Harrington

Hill

et al. 2016

J. Anal. At. Spectrom.

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Section: Mercurymentioning

confidence: 99%

Atomic Spectrometry Update: review of advances in elemental speciation

Clough

Harrington

Hill

et al. 2016

J. Anal. At. Spectrom.

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“…Organomercury compounds are liposoluble and penetrate biological membranes easily (Carneado et al, 2015). The most hazardous and neurotoxic form of organomercury is methylated Hg (MeHg) (Schroeder and Munthe, 1998), in particular CH 3 Hg + (monomethylmercury).…”

Section: Introductionmentioning

confidence: 99%

Mercury in Sediment Core Samples From Deep Siberian Ice-Rich Permafrost

et al. 2021

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We determine Hg concentrations of various deposits in Siberia’s deep permafrost and link sediment properties and Hg enrichment to establish a first Hg inventory of late Pleistocene permafrost down to a depth of 36 m below surface. As Arctic warming is transforming the ice-rich permafrost of Siberia, sediment is released and increases the flux of particulates to the Arctic shelf seas through thawing coasts, lakeshores, and river floodplains. Heavy metals within soils and sediments are also released and may increasingly enter Arctic waters and the biological food chain. High levels of mercury (Hg) have been reported from shallow soils across the Arctic. Rapid thawing is now mobilizing sediment from deeper strata, but so far little is known about Hg concentrations in deep permafrost. Here, forty-one samples from sediment successions at seven sites and of different states of permafrost degradation on Bykovsky Peninsula (northern Yakutian coast) and in the Yukechi Alas region (Central Yakutia) were analyzed for Hg, total carbon, total nitrogen, and total organic carbon as well as grain-size distribution, bulk density, and mass specific magnetic susceptibility. We show average Hg concentrations of 9.72 ± 9.28 μg kg−1 in the deep sediments, an amount comparable to the few previous Arctic studies existing, and a significant correlation of Hg content with total organic carbon, total nitrogen, grain-size distribution, and mass specific magnetic susceptibility. Hg concentrations are higher in the generally sandier sediments of the Bykovsky Peninsula than in the siltier sediments of the Yukechi Alas. The ratio of Hg to total organic carbon in this study is 2.57 g kg−1, including samples with very low carbon content. We conclude that many deep permafrost sediments, some of which have been frozen for millennia, contain elevated concentrations of Hg and the stock of Hg ready to be released by erosion is of significance for the Arctic ecosystem. The Hg mobilized may accumulate on the way to or in the shallow sea, and where it enters into active biogeochemical cycles of aquatic systems it may concentrate in food webs. Our study highlights the need for better understanding Hg stocks and Hg release from permafrost.

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“…In order to control the risk of Hg 2+ , the US Environmental Protection Agency (EPA) and the World Health Organization (WHO) set a maximum contents of Hg 2+ in drinking water which are 2.0 μg/L (10 nM) and 6.0 μg/L (30 nM), respectively [ 3 ]. In practice, numerous conventional lab-dependent techniques such as inductively-coupled plasma mass spectrometry (ICP-MS) [ 4 ], atomic fluorescence spectrometry (AFS) [ 5 ], and high performance liquid chromatography (HPLC) [ 6 , 7 ] have been well-established for detection of Hg 2+ . However, their operations are highly dependent on time-consuming sample pretreatments, expensive instrumentation, and skilled technicians, making them unsuitable for rapid and on-site detection of target Hg 2+ ions [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

DNA–Gold Nanozyme-Modified Paper Device for Enhanced Colorimetric Detection of Mercury Ions

et al. 2020

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In this work, a paper device consisted of a patterned paper chip, wicking pads, and a base was fabricated. On the paper chip, DNA–gold nanoparticles (DNA–AuNPs) were deposited and Hg2+ ions could be adsorbed by the DNA–AuNPs. The formed DNA–AuNP/Hg2+ nanozyme could catalyze the tetramethylbenzidine (TMB)–H2O2 chromogenic reaction. Due to the wicking pads, a larger volume of Hg2+ sample could be applied to the paper device for Hg2+ detection and therefore the color response could be enhanced. The paper device achieved a cut-off value of 50 nM by the naked eye for Hg2+ under optimized conditions. Moreover, quantitative measurements could be implemented by using a desktop scanner and extracting grayscale values. A linear range of 50–2000 nM Hg2+ was obtained with a detection limit of 10 nM. In addition, the paper device could be applied in the detection of environmental water samples with high recoveries ranging from 85.7% to 105.6%. The paper-device-based colorimetric detection was low-cost, simple, and demonstrated high potential in real-sample applications.

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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

Cited by 20 publications

References 34 publications

Atomic Spectrometry Update: review of advances in elemental speciation

Atomic Spectrometry Update: review of advances in elemental speciation

Mercury in Sediment Core Samples From Deep Siberian Ice-Rich Permafrost

DNA–Gold Nanozyme-Modified Paper Device for Enhanced Colorimetric Detection of Mercury Ions

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