Preliminary studies on the stability of arsenolipids: Implications for sample handling and analysis

Khan, Muslim; Francesconi, Kevin A.

doi:10.1016/j.jes.2016.04.004

Cited by 26 publications

(23 citation statements)

References 14 publications

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“…Silica gel has also been used for the cleanup of MeOH/DCM extracts of marine algae to improve chromatographic separation. , Studies of the silica chromatography cleanup procedure by Glabonjat et al demonstrate that the technique is effective for arsenic-containing hydrocarbons (AsHCs) and arsenosugar phospholipids (AsSugar-PL) with apparent negligible losses . However, when the procedure was applied on lipids in fish oil containing high amounts of AsFA conjugates, most of the initial compounds were altered by the procedure. , Therefore, washing the column with a H 2 S/acetone mixture that converts oxo-AsLipids to their thio analogues that are less polar and readily elute from the column may address this challenge …”

Section: Sample Cleanup Proceduresmentioning

confidence: 99%

“…Speciation analysis of seafood samples requires analytical methods that can quantitatively characterize diverse forms of arsenic from dietary sources; however, matrix complexity and the general dominance of AsB are an impediment. − It is also imperative that the arsenic species in the sample are maintained in the form that they naturally occur in food . This requires analytical methods that prevent species interconversions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analytical Methodologies for the Determination of Organoarsenicals in Edible Marine Species: A Review

Luvonga

Rimmer

et al. 2020

J. Agric. Food Chem.

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Setting regulatory limits for arsenic in food is complicated, owing to the enormous diversity of arsenic metabolism in humans, lack of knowledge about the toxicity of these chemicals, and lack of accurate arsenic speciation data on foodstuffs. Identification and quantification of the toxic arsenic compounds are imperative to understanding the risk associated with exposure to arsenic from dietary intake, which, in turn, underscores the need for speciation analysis of the food. Arsenic speciation in seafood is challenging, owing to its existence in myriads of chemical forms and oxidation states. Interconversions occurring between chemical forms, matrix complexity, lack of standards and certified reference materials, and lack of widely accepted measurement protocols present additional challenges. This review covers the current analytical techniques for diverse arsenic species. The requirement for high-quality arsenic speciation data that is essential for establishing legislation and setting regulatory limits for arsenic in food is explored.

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Section: Sample Cleanup Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical Methodologies for the Determination of Organoarsenicals in Edible Marine Species: A Review

Luvonga

Rimmer

et al. 2020

J. Agric. Food Chem.

View full text Add to dashboard Cite

show abstract

“…The sensitivity of ICPMS to detect arsenic is limited by its relatively high ionization potential. In order to compensate for this effect, various methods have been used, including adding supplemental methanol or ethanol solution to the spray chamber [159] or after the column via the T-piece [91], and the use of correction response factors. Finally, internal standardization was used to overcome the non-spectral matrix effects and instrumental drift [160].…”

Section: Detection Systems Of Arsenic Speciesmentioning

confidence: 99%

Arsenic Speciation Techniques in Soil Water and Plant: An Overview

Kamal¹,

Miah²

2022

Arsenic Monitoring, Removal and Remediation

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There are more than 100 different arsenic with different characteristics in the soil-water-plant ecosystem. The identification and quantification of individual arsenic species is essential for understanding the distribution, environmental fate and behavior, metabolism and toxicity of arsenic. Due to the hazardous nature of arsenic, people have a high interest in the measurement of arsenic species. The reaction of the formation of arsenic speciation in the soil-water-plant environment is briefly studied. There is little information on methods used to quantify arsenic forms and species in contaminated soil, water and plant. The purpose of this article is to understand the available sample pretreatment, extraction, separation, detection and method validation techniques for arsenic speciation analysis of arsenic species in soil, water and plant. The performances of various sample preparation and extraction processes, as well as effective separation techniques, that contribute greatly to excellent sensitivity and selectivity in arsenic speciation when coupling with suitable detection mode, and method validity are discussed. The outlines of arsenic speciation techniques are discussed in view of the importance to the completeness and accuracy of analytical data in the soil-water-plant samples. To develop cheap, fast, sensitive, and reproducible techniques with low detection limits, still needed to confine research on arsenic speciation present in environmental matrices.

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“…Most algal compounds transform the arsenate into various arsenosugars, a process thought to protect the algae from potentially toxic arsenate. [5][6][7][8][9] Some seaweeds, like Fucus serratus and Laminaria spp. are known to contain mainly arsenosugar compounds, whereas inorganic As (iAs) compounds, such as As(III) and As(V), are found in these algae only at trace levels.…”

Section: Introductionmentioning

confidence: 99%

A New Candidate Reference Material for Inorganic Arsenic and Arsenosugars in Hijiki Seaweed: First Results from an Interlaboratory Study

et al. 2020

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An inter-laboratory study was carried out to characterize a candidate hijiki seaweed for its concentrations of total arsenic and water-soluble arsenic compounds, particularly arsenosugar compounds. The candidate material, a dried hijiki seaweed powder, was analyzed by individual techniques in two laboratories. The water-soluble arsenic compounds were separated by anion exchange, and reversed-phase columns, and As(V), DMA and four kinds of arsenosugars, namely glycerol (-OH), phosphate (-PO4), sulfonate (-SO3), and sulfate (-SO4) types were detected by HPLC-ICP-MS. The methods applied were validated by analyzing a second sample, the NMIJ CRM 7405-a hijiki seaweed, which is certified for both total arsenic and As(V). Techniques for the inter-laboratory study, extraction efficiencies under different extraction conditions, some chromatographic techniques and sequential extraction were investigated. The results from the two laboratories for the candidate hijiki material showed good agreement within the measurement uncertainties for total and water-soluble arsenic compounds.

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Preliminary studies on the stability of arsenolipids: Implications for sample handling and analysis

Cited by 26 publications

References 14 publications

Analytical Methodologies for the Determination of Organoarsenicals in Edible Marine Species: A Review

Analytical Methodologies for the Determination of Organoarsenicals in Edible Marine Species: A Review

Arsenic Speciation Techniques in Soil Water and Plant: An Overview

A New Candidate Reference Material for Inorganic Arsenic and Arsenosugars in Hijiki Seaweed: First Results from an Interlaboratory Study

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