Quantification and speciation of mercury in streams and rivers sediment samples from Paracatu, MG, Brazil, using a direct mercury analyzer®

Rezende, Patrícia Sueli; Silva, Nayara Carolinne; Moura, William Douglas; Windmöller, Cláudia Carvalhinho

doi:10.1016/j.microc.2018.04.006

Cited by 15 publications

(6 citation statements)

References 54 publications

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“…Finally, an interesting work using a direct analyzer for the quantification and speciation analysis of Hg in sediment samples was developed [108]. Direct chemical speciation was achieved based on the different thermal behavior of the species, in a system that consisted of an electronically controlled heating unit and an atomic absorption spectrometer.…”

Section: Mercurymentioning

confidence: 99%

Elemental Speciation Analysis in Environmental Studies: Latest Trends and Ecological Impact

Llaver

Fiorentini

Oviedo

et al. 2021

IJERPH

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Speciation analysis is a key aspect of modern analytical chemistry, as the toxicity, environmental mobility, and bioavailability of elemental analytes are known to depend strongly on an element’s chemical species. Henceforth, great efforts have been made in recent years to develop methods that allow not only the determination of elements as a whole, but also each of its separate species. Environmental analytical chemistry has not ignored this trend, and this review aims to summarize the latest methods and techniques developed with this purpose. From the perspective of each relevant element and highlighting the importance of their speciation analysis, different sample treatment methods are introduced and described, with the spotlight on the use of modern nanomaterials and novel solvents in solid phase and liquid-liquid microextractions. In addition, an in-depth discussion of instrumental techniques aimed both at the separation and quantification of metal and metalloid species is presented, ranging from chromatographic separations to electro-chemical speciation analysis. Special emphasis is made throughout this work on the greenness of these developments, considering their alignment with the precepts of the Green Chemistry concept and critically reviewing their environmental impact.

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Section: Mercurymentioning

confidence: 99%

Elemental Speciation Analysis in Environmental Studies: Latest Trends and Ecological Impact

Llaver

Fiorentini

Oviedo

et al. 2021

IJERPH

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“…Nevertheless, the main limitation of this technique is its exclusive success on total Hg concentration, not extended to speciation. A few recent examples suggest the possibility of using thermal release for speciation in solid samples [37], not yet widely extended. The recent combination of a thiourea derivative polymer with DMA leads to the screening of Hg(II) and MeHg in food, specifically in fish [38].…”

Section: Advances On the Determination Of Total Hg In Foodmentioning

confidence: 99%

Advances in the Determination of Xenobiotics in Foods

2019

Current and Future Developments in Food Science

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Mercury (Hg) pollution is an acknowledged major environmental problem. Considering its extreme toxicity, Hg has recently been included in the top ten list of chemicals of major public health concern according to the World Health Organization. Once released into the environment, it is transformed in aquatic ecosystems by microorganisms into the neurotoxic methylmercury. The hazardous effect is then biomagnified through the trophic/food chain. Diet is considered the main exposure pathway of Hg in humans. Therefore, safety values have been established by food safety authorities in order to protect consumers. Seafood, followed by rice, is the primary source of Hg in the human diet. A variety of analytical methodologies is available for the analysis of Hg and its species in food. This chapter presents recent advances in the determination of Hg in foodstuffs. Special attention is given to innovative Hg (species) extraction and preconcentration systems assisted by nanoparticles. Non-chromatographic approaches, as an alternative to classical chromatographic approaches used for speciation are detailed. The potential and limitations of Hg isotopic analysis in food is also discussed.

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“…El mercurio orgánico se encuentra en el agua, principalmente como metilmercurio [CH 3 Hg] + y es el componente más común en la cadena alimentaria (Rezende, Silva, Moura, & Windmöller, 2018).…”

Section: Introductionunclassified

Determinación Y Cuantificación De Mercurio Total en Tejido Muscular De Pargo (Lutjanus Colorado), Mediante La Técnica De Vapor Frío Acoplado a Espectrofotometría De Fluorescencia Atómica

Bustamante

Fernández

Cueva

2021

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Se determinó mercurio total en pescado pargo mediante la técnica de vapor frío acoplado a espectrofotometría de fluorescencia atómica (CV-AFS, por sus siglas en inglés). Se llevó a cabo un muestreo no probabilístico en el mercado América de la ciudad de Quito. Las muestras de pescado se sometieron a un proceso de liofilización y digestión ácida asistida por microondas. Se obtuvo valores de concentración de mercurio total de 0,077; 0,079; 0,046; 0,093 y 0,113 mg kg-1 respectivamente, cuyos coeficientes de variación fueron 5,00; 3,91; 3,01; 16,1 y 14,5 %. Para las muestras de pargo mediano se obtuvieron valores de 0,163; 0,111; 0,176; 0,201 y 0,185 mg kg-1, y sus coeficientes de variación fueron 13,3; 17,6; 8,18; 9,64 y 14,5 %. Mientras que para las muestras de pargo grande los valores obtenidos fueron: 0,160; 0,182; 0,176; 0,361 y 0,170 mg kg-1, dando coeficientes de variación de 10,6; 8,79; 16,8; 4,57 y 9,45 %. Las muestras de pargo grande presentaron un mayor contenido de mercurio en su organismo. Se determinó que las muestras de pescado contienen mercurio, sin embargo, no exceden los límites máximos permisibles establecidos por el Codex Alimentarius.

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Quantification and speciation of mercury in streams and rivers sediment samples from Paracatu, MG, Brazil, using a direct mercury analyzer®

Cited by 15 publications

References 54 publications

Elemental Speciation Analysis in Environmental Studies: Latest Trends and Ecological Impact

Elemental Speciation Analysis in Environmental Studies: Latest Trends and Ecological Impact

Advances in the Determination of Xenobiotics in Foods

Determinación Y Cuantificación De Mercurio Total en Tejido Muscular De Pargo (Lutjanus Colorado), Mediante La Técnica De Vapor Frío Acoplado a Espectrofotometría De Fluorescencia Atómica

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