An international proficiency test as a tool to evaluate mercury determination in environmental matrices

Reis, Ana Teresa; Duarte, Armando C.; Henriques, Bruno; Coelho, C.; Lopes, Cláudia B.; Mieiro, C.L.; Tavares, Daniela; Ahmad, Iqbal; Coelho, J.P.; Rocha, Luciana S.; Cruz, Nuno; Monteiro, Rui; Rocha, Rui; Rodrigues, Sónia; Pereira, Eduarda

doi:10.1016/j.trac.2014.08.015

Cited by 8 publications

(4 citation statements)

References 106 publications

(132 reference statements)

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“…Literature review shows that the quantity of mercury extracted from soil can be extremely variable, depending on the nature of both the soil and the leaching solution [74]. Therefore, it is difficult for a researcher to identify the suitable method according to their particular situation, but the choice of mercury speciation method to use for a specific sample ought to consider a number of criteria:…”

Section: Overview and Final Remarksmentioning

confidence: 99%

“…Interlaboratory exercises are a way of addressing these issues, since they will test the robustness of the procedures; the tested soil samples can, eventually, be certificate as reference materials. The ILAE-Hg-02 intercalibration exercise [74] proposed the extraction of bioaccessible and organometallic fractions, in addition to measurement of total mercury, due to their environmental relevance. However, the results of this interlaboratory exercise revealed that there is some reluctance in performing chemical extractions, as proven by the low number of participants who returned speciation results.…”

Section: Overview and Final Remarksmentioning

confidence: 99%

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Overview and challenges of mercury fractionation and speciation in soils

Reis

Davidson

Vale

et al. 2016

TrAC Trends in Analytical Chemistry

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Analytical procedures to assess mercury speciation in soils still lack consensus. This article presents an overview of the mercury fractionation and speciation procedures used in soils. Mercury fractionation is the most common approach despite the operational definition of the fractions. Application of single extraction procedures that target the water-soluble, exchangeable and acid-soluble fractions and the application of EPA method 3200 for mercury sequential extraction are examined in soils with different physicochemical characteristics. A step forward in mercury speciation is thermo-desorption, a useful tool to rapidly obtain needed information about contaminated soils. The advantages and limitations of these procedures are compared; the importance of soils’ physicochemical characteristics highlighted. Criteria to be considered when choosing a suitable method are given - assessing total mercury concentration, soil physicochemical characteristics, environmental conditions, and legislation. It is recommended that the interpretation of results is done wisely, to correctly support decisions concerning intervention strategies at contaminated sites

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Section: Overview and Final Remarksmentioning

confidence: 99%

Section: Overview and Final Remarksmentioning

confidence: 99%

Overview and challenges of mercury fractionation and speciation in soils

Reis

Davidson

Vale

et al. 2016

TrAC Trends in Analytical Chemistry

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“…Mercury pollution is a global problem and contaminated water is a major source of human exposure [1][2][3]. As numerous industry branches and agriculture make use of mercury, it has badly contaminated rivers and soil and accumulates in agricultural and aquatic products, which causes serious environmental and health problems [4].…”

Section: Introductionmentioning

confidence: 99%

A Simple Method for Colorimetric and Naked-Eye Detection of Mercury in Fish Products

Saranchina

Dudkina

Gavrilenko

et al. 2019

MSF

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A new colorimetric optode has been developed for preconcentration and visual determination of mercury ions in fish products. This optode is based on the color reaction of copper diethyldithiocarbamate with Hg2+ in the body of polymethylmethacrylate matrix. The optode exhibited sensitivity through the change of color from brown to colorless, which could be easily detected by naked-eye or spectrophotometric method. The influence of acidity, contact time and interference of foreign metal ions has been studied. The optode revealed good linearity in the range of 20-360 μg·L-1, with a limit of detection of 8 μg·L-1 Hg2+ at pH 5.2 and response time of 10 min.

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“…Mercury (Hg) is one of the most critical contaminants in the environment and it is present in water, soils, sediments and air usually at trace levels [2]. However, anthropogenic sources like mining, industry, coal-fired power plants and sludge dumping have increased the natural concentration of Hg and led to severely contaminated environments [3,4].…”

Section: Introductionmentioning

confidence: 99%