Assessment of the bioavailability of toxic and non-toxic arsenic species in seafood samples

Moreda–Piñeiro, Jorge; Alonso-Rodríguez, Elia; Romarís–Hortas, Vanessa; Moreda–Piñeiro, Antonio; López-Mahı́a, Purificación; Muniategui-Lorenzo, Soledad; Prada‐Rodríguez, D.; Bermejo-Barrera, Pilar

doi:10.1016/j.foodchem.2011.07.071

Cited by 66 publications

(31 citation statements)

References 32 publications

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“…Recently, studies focusing on the bioavailability of heavy metals are shifted from the total metal concentrations to their chemical species (Dacera and Babel, 2012;Han et al, 2014;Lee et al, 2011;Moreda-Piñeiro et al, 2012). The chemical forms of heavy metals in ambient are defined as five fractions: exchangeable, carbonate, iron-manganese oxides, organic matter and residual (Tessier et al, 1979).…”

Section: Heavy Metals Concentration and Their Chemical Formsmentioning

confidence: 99%

Effects of sediment geochemical properties on heavy metal bioavailability

Zhang

Zeng

et al. 2014

Environment International

655

206

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As the largest container and resource of metals, sediment has a special role in the fate of metals. Factors influencing bioavailability of heavy metals in sediment have never been comprehensively considered and the sediment properties still fail to understand and even controversial. In this review, the mechanisms of sediment properties such as acid-volatile sulfides (AVS), organic matter, texture (clay, silt or sand) and geology, organism behaviors as well as those influencing the bioavailability of metals were analyzed. Under anoxic condition, AVS mainly reduce the solubility and toxicity of metals, while organic matters, Fe-Mn oxides, clay or silt can stabilize heavy metals in elevated oxidative-reductive potential (ORP). Other factors including the variation of pH, redox potential, aging as well as nutrition and the behavior of benthic organism in sediment also largely alter metals mobility and distribution. These factors are often inter-related, and various toxicity assessment methods used to evaluate the bioavailability of trace metals have been also discussed. Additionally, we expect that some novel synthetic materials like polysulfides, nano-materials, provide the substantial amendments for metals pollution in sediment.

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Section: Heavy Metals Concentration and Their Chemical Formsmentioning

confidence: 99%

Effects of sediment geochemical properties on heavy metal bioavailability

Zhang

Zeng

et al. 2014

Environment International

655

206

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“…[11][12][13][14][15][16][17][18][19][20] As a result, special equipment used for the complete decomposition of sample components and sophisticated operators are not required. [11][12][13][14][15][16][17][18][19][20] As a result, special equipment used for the complete decomposition of sample components and sophisticated operators are not required.…”

Section: Instructionmentioning

confidence: 99%

Online solid sampling platform using multi-wall carbon nanotube assisted matrix solid phase dispersion for mercury speciation in fish by HPLC-ICP-MS

Deng

Zhang

Chen³

et al. 2015

J. Anal. At. Spectrom.

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The integrity of chemical species throughout the analytical procedure and sample throughput are usually two serious impediments in elemental speciation. In this work, a simple solid sampling platform using multi-wall carbon nanotubes (MWCNTs) assisted matrix solid phase dispersion (MSPD) was constructed for online coupling to high performance liquid chromatography inductively coupled plasma mass spectrometry (HPLC-ICP-MS) for the high accuracy and sample throughput mercury speciation in fish samples. Owing to the large surface area and excellent mechanical strength of MWCNTs, which facilitate a sufficient dispersion of a sample matrix and diffusion of the eluent into the mixture of solid support and fish samples, a fast, efficient and online extraction of mercury species was achieved. Compared to the conventional MSPD and other sample pretreatment methods, the proposed method has several advantages including the integration of extraction, clean-up, separation and determination into one single step to achieve a high sample throughput, eliminating the need for derivatization of the Hg species and/or subsequent purification steps, reduced usage of solid supports, minimized contamination and mild operation conditions. The limits of detection of 9.9 ng g À1 and 8.4 ng g À1 were obtained for Hg 2+ and CH 3 Hg + , respectively, based on 1 mg of fish sample. The accuracy of the proposed method was validated by analyzing two certified reference materials. The proposed method was applied for two fresh fish samples for Hg speciation.

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“…A metabolic study of arsenolipids in two volunteers showed that arsenolipids were readily absorbed and converted to water-soluble arsenicals; 90 % were excreted in the urine during 66 h [52]. The absorption of tAs, AB and AC has been shown to decrease with increased fat content in seafood, while it seems not to be affected by the protein content [53,54].…”

mentioning

confidence: 99%