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

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

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

High-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS) has been applied for the development of a method for the determination of total As in fish oil samples using direct analysis. The method does not use any sample pretreatment, besides dilution with 1-propanole, in order to decrease the oil viscosity. The stability and sensitivity of As were evaluated using ruthenium and iridium as permanent chemical modifiers and palladium added in solution over the sample. The best results were obtained with ruthenium as the permanent modifier and palladium in solution added to samples and standard solutions. Under these conditions, aqueous standard solutions could be used for calibration for the fish oil samples diluted with 1-propanole. The pyrolysis and atomization temperatures were 1400°C and 2300°C, respectively, and the limit of detection and characteristic mass were 30pg and 43pg, respectively. Accuracy and precision of the method have been evaluated using microwave-assisted acid digestion of the samples with subsequent determination by HR-CS GF AAS and ICP-MS; the results were in agreement (95% confidence level) with those of the proposed method.

Original languageEnglish
Pages (from-to)142-147
Number of pages6
JournalTalanta
Volume150
Early online date14 Dec 2015
DOIs
Publication statusPublished - 1 Apr 2016

Fingerprint

Atomic absorption spectrometry
Graphite
Fish Oils
Arsenic
Spectrum Analysis
Furnaces
Ruthenium
Palladium
Iridium
Atomization
Microwaves
Viscosity
Calibration
Dilution
Limit of Detection
Digestion
Oils
Pyrolysis
Temperature
Acids

Keywords

  • high-resolution continuum source atomic absorption spectrometry
  • graphite furnace atomization
  • arsenic determination
  • fish oil
  • direct analysis

Cite this

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; de Almeida, Tarcísio S; Borges, Daniel L G; Carasek, Eduardo; Welz, Bernhard; Feldmann, Jörg; Campo Menoyo, Javier Del.

In: Talanta, Vol. 150, 01.04.2016, p. 142-147.

Research output: Contribution to journalArticle

Pereira, Éderson R ; de Almeida, Tarcísio S ; Borges, Daniel L G ; Carasek, Eduardo ; Welz, Bernhard ; Feldmann, Jörg ; Campo Menoyo, Javier Del. / Investigation of chemical modifiers for the direct determination of arsenic in fish oil using high-resolution continuum source graphite furnace atomic absorption spectrometry. In: Talanta. 2016 ; Vol. 150. pp. 142-147.
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abstract = "High-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS) has been applied for the development of a method for the determination of total As in fish oil samples using direct analysis. The method does not use any sample pretreatment, besides dilution with 1-propanole, in order to decrease the oil viscosity. The stability and sensitivity of As were evaluated using ruthenium and iridium as permanent chemical modifiers and palladium added in solution over the sample. The best results were obtained with ruthenium as the permanent modifier and palladium in solution added to samples and standard solutions. Under these conditions, aqueous standard solutions could be used for calibration for the fish oil samples diluted with 1-propanole. The pyrolysis and atomization temperatures were 1400°C and 2300°C, respectively, and the limit of detection and characteristic mass were 30pg and 43pg, respectively. Accuracy and precision of the method have been evaluated using microwave-assisted acid digestion of the samples with subsequent determination by HR-CS GF AAS and ICP-MS; the results were in agreement (95{\%} confidence level) with those of the proposed method.",
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AU - Borges, Daniel L G

AU - Carasek, Eduardo

AU - Welz, Bernhard

AU - Feldmann, Jörg

AU - Campo Menoyo, Javier Del

N1 - Copyright © 2015 Elsevier B.V. All rights reserved. Acknowledgments The authors are grateful to Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for financial support and scholarships. The present research was mostly financed through Project no. CNPq 406877/2013-0. The authors are also grateful to Analytik Jena for financial support and donation of the contrAA 600 high-resolution continuum source atomic absorption spectrometer.

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N2 - High-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS) has been applied for the development of a method for the determination of total As in fish oil samples using direct analysis. The method does not use any sample pretreatment, besides dilution with 1-propanole, in order to decrease the oil viscosity. The stability and sensitivity of As were evaluated using ruthenium and iridium as permanent chemical modifiers and palladium added in solution over the sample. The best results were obtained with ruthenium as the permanent modifier and palladium in solution added to samples and standard solutions. Under these conditions, aqueous standard solutions could be used for calibration for the fish oil samples diluted with 1-propanole. The pyrolysis and atomization temperatures were 1400°C and 2300°C, respectively, and the limit of detection and characteristic mass were 30pg and 43pg, respectively. Accuracy and precision of the method have been evaluated using microwave-assisted acid digestion of the samples with subsequent determination by HR-CS GF AAS and ICP-MS; the results were in agreement (95% confidence level) with those of the proposed method.

AB - High-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS) has been applied for the development of a method for the determination of total As in fish oil samples using direct analysis. The method does not use any sample pretreatment, besides dilution with 1-propanole, in order to decrease the oil viscosity. The stability and sensitivity of As were evaluated using ruthenium and iridium as permanent chemical modifiers and palladium added in solution over the sample. The best results were obtained with ruthenium as the permanent modifier and palladium in solution added to samples and standard solutions. Under these conditions, aqueous standard solutions could be used for calibration for the fish oil samples diluted with 1-propanole. The pyrolysis and atomization temperatures were 1400°C and 2300°C, respectively, and the limit of detection and characteristic mass were 30pg and 43pg, respectively. Accuracy and precision of the method have been evaluated using microwave-assisted acid digestion of the samples with subsequent determination by HR-CS GF AAS and ICP-MS; the results were in agreement (95% confidence level) with those of the proposed method.

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