Investigation of chemical modifiers for the direct determination of arsenic in fish oil using high-resolution continuum source graphite furnace atomic absorption spectrometry

Pereira, Éderson R.; Almeida, Tarcísio S.; Borges, Daniel L. G.; Carasek, Eduardo; Welz, Bernhard; Feldmann, Jörg; Menoyo, Javier del Campo

doi:10.1016/j.talanta.2015.12.036

Cited by 26 publications

(14 citation statements)

References 30 publications

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“…In this study, we observed that differences in the behavior of As species, when atomized in the presence of different chemical modifiers, allowed the direct speciation of AsB by SLS-GF AAS. The dependence of As atomization on the chemical modifier have already been reported in previous works 25,29 . Differences in the behavior of organic and inorganic arsenic were observed when solutions containing different composition and/or masses of chemical modifiers were used 25,29 .…”

Section: Total As Determination and Direct Chemical Speciationsupporting

confidence: 68%

“…The As species in robalo liver are still unknown, although some evidences have shown that part of As is likely present in the form of arsenolipids 14 . The difference in the behavior of As species was discussed in a recent work by Pereira and coworkers 29 . Their work has identified differences in pyrolysis curves from As(III) aqueous solutions and As in fish oil when Pd + Ru were used as chemical modifiers, which may be related to the presence of other As species besides of As(III), such as arsenolipids.…”

Section: Total As Determination and Direct Chemical Speciationmentioning

confidence: 93%

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Direct determination of arsenobetaine and total As in robalo fish liver and tuna fish candidate reference material by slurry sampling graphite furnace atomic absorption spectrometry (SLS-GF AAS)

et al. 2019

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This work describes a simple and rapid screening method for direct speciation of arsenobetaine (AsB) in tuna fish tissue and total As in tuna fish tissue and robalo liver using SLS-GF AAS. All procedures were proposed after careful optimization of pyrolysis and evaluation of chemical modifiers. Best results for total As were acquired using 25 µg Pd + 15 µg Mg + 0.1% w/v Triton X-100 in tuna fish (4.4 ± 0.3 mg kg-1) and 100 µg Pd + 0.1 % w/v Triton X-100 solution in robalo liver (10.3 ± 0.6 mg kg-1) as chemical modifiers. The direct speciation of AsB (3.6 ± 0.4 mg kg-1) in tuna fish was achieved when 5 µg Pd + 3 µg Mg + 0.1% w/v Triton X-100 was used as a chemical modifier. Accuracy was verified using a tuna fish certified reference material (CRM BCR 627), with statistically equivalent concentrations (Student’s t-test) for both total As and AsB.

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Section: Total As Determination and Direct Chemical Speciationsupporting

confidence: 68%

Section: Total As Determination and Direct Chemical Speciationmentioning

confidence: 93%

Direct determination of arsenobetaine and total As in robalo fish liver and tuna fish candidate reference material by slurry sampling graphite furnace atomic absorption spectrometry (SLS-GF AAS)

et al. 2019

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“…6, n. 14, p. 803-817. Oliveira et al, 2016;Souza et al, 2016;Pereira et al, 2016), hydride generation combined with inductively coupled plasma optical emission spectrometry HG ICP OES (Kim et al, 2019), hydride generation combined with atomic fluorescence spectrometry (HG AFS) (Wang et al, 2016), microwave induced plasma optical emission spectrometry (MIP OES) (Gallego Ríos et al, 2018), visible ultraviolet spectroscopy (UV VIS) (Gürkan et al, 2015), total reflection X-ray fluorescence (TXRF) (Pierangeli et al, 2015) and portable X-ray fluorescence (PXRF) (García-Rico et al, 2019;Kim et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Arsenic quantification techniques and ISO/IEC 17025 accreditation in Brazil

Santos¹,

Busato²,

Heringer³

et al. 2019

Rev. Bras. Gest. Amb. Sustent.

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The importance of arsenic (As) quantification in environmental compartments is due to its risks to ecosystems and public health. There are reports of high concentrations of this metalloid in Brazil and technological differences between states are observed. The objective of this work was to present and discuss current scenarios of accreditation and compare the limit of quantification (LOQ) of As by analytical technique in Brazil. Data from accredited laboratories were collected on Inmetro website and in state metrological networks and then grouped and analyzed by state, matrix and analytical technique. There are large discrepancies between the number of laboratories per state and a good correlation with gross domestic product (GDP). Almost all laboratories have a LOQ less than the environmental limits. The observed list of techniques sorted from lowest to highest LOQ values is: for liquid samples ICP MS (inductively coupled plasma mass spectrometry), ET AAS (electrothermal atomic absorption spectrometry), HG AAS (hydride generation combined with atomic absorption spectrometry) or HG ICP OES (hydride generation combined with inductively coupled plasma optical emission spectrometry) and UV VIS (visible ultraviolet spectroscopy); for solids samples HG ICP OES, ICP MS, HG AAS, ET AAS and FAAS (flame atomic absorption spectrometry); and for bioindicators ICP MS, HG ICP OES. Analysis of As species is accredited in only one laboratory, but does not include all species.

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“…Recently, there is much concern about the increasing level of arsenic pollution in water and soil environment. To date, many methods have been employed for determination of inorganic arsenic including atomic fluorescence spectroscopy [2], atomic absorption spectrometry [3], atomic emission spectrometry [4], surface-enhanced Raman scattering [5] and mass spectrometry [6]. However, these traditional laboratory based measurements require expensive, ponderous and sophisticated instruments, high operating costs and complicated sample preparation processes with digestion or some clean-up steps, which are time consuming and limit the application for routine field monitoring of such huge numbers of samples [7].…”

Section: Introductionmentioning

confidence: 99%

Time Resolved Direct Determination of Arsenate in the Presence of Arsenite on Pencil Graphite Electrode Modified by Graphene Oxide and Zirconium

Pourbeyram

Asadi

2017

Electroanalysis

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Trace amount of arsenate in the presence of arsenite was determined directly on pencil graphite electrode modified by graphene oxide and zirconium (ZrÀGÀPGE). The layer-by-layer modification of PGE was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV). Key point of the developed method was quick adsorption of arsenate than arsenite on the ZrÀGÀPGE. In optimal conditions, the ZrÀGÀPGE was applied for determination of arsenate using differential pulse voltammetry in a linear range 0.10-40.0 mg L À1 with a limit of determination of 0.12 AE 0.01 mg L À1 . The sensitivity of the electrode was 1.36 AE 0.07 mA/mg L À1 . The modified electrode was used to measure the concentration of arsenate in the river water. A recovery test was performed by introducing 10 mg L À1 arsenate into the rivers water in order and acceptable data of average recovery of 101.2 % was obtained. From the experimental results, the as-prepared electrode can provide a satisfactory method for direct determination of arsenate in real samples.

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Investigation of chemical modifiers for the direct determination of arsenic in fish oil using high-resolution continuum source graphite furnace atomic absorption spectrometry

Cited by 26 publications

References 30 publications

Direct determination of arsenobetaine and total As in robalo fish liver and tuna fish candidate reference material by slurry sampling graphite furnace atomic absorption spectrometry (SLS-GF AAS)

Direct determination of arsenobetaine and total As in robalo fish liver and tuna fish candidate reference material by slurry sampling graphite furnace atomic absorption spectrometry (SLS-GF AAS)

Arsenic quantification techniques and ISO/IEC 17025 accreditation in Brazil

Time Resolved Direct Determination of Arsenate in the Presence of Arsenite on Pencil Graphite Electrode Modified by Graphene Oxide and Zirconium

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