Investigation of chemical modifiers for the determination of cadmium and chromium in fish oil and lipoid matrices using HR-CS GF AAS and a simple ‘dilute-and-shoot’ approach

Mauana Schneider, Éderson R Pereira, Daiane P.C. de Quadros, Bernhard Welz (Corresponding Author), Eduardo Carasek, Jailson B. de Andrade, Javier Del Campo Menoyo, Jorg Feldmann

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Abstract

This work presents simple and reliable methods for the determination of Cd and Cr in fish oil and lipoid samples by high-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS). Only a simple dilution using 1-propanol was adopted as sample preparation for the determination of Cd and Cr in order to reduce the high viscosity of the lipoid samples. Pt was employed as permanent chemical modifier and Pd was used as chemical modifier in solution, added over the sample for the determination of Cd for a better performance and sensitivity. Cr was determined without a chemical modifier. The accuracy of the proposed methods was evaluated by comparison with microwave-assisted digested samples and determination by HR-CS GF AAS, showing good agreement between 2% and 13% for both elements without statistical difference (confidence interval of 95%). The limits of detection for Cd and Cr were 0.5 pg and 7 pg, respectively, corresponding to 0.15 ng g− 1 and 2 ng g− 1, respectively. The developed methods can be described as clean, fast and accurate, which did not require any sample pre-treatment stages, such as digestion or matrix oxidation, and could be extended to different lipoid matrices, demonstrating their robustness.
Original languageEnglish
Pages (from-to)175-181
Number of pages7
JournalMicrochemical Journal
Volume133
Early online date23 Mar 2017
DOIs
Publication statusPublished - Jul 2017

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Fish Oils
Chromium
Cadmium
1-Propanol
Atomic absorption spectrometry
Graphite
Dilution
Furnaces
Microwaves
Viscosity
Oxidation

Keywords

  • High-resolution continuum source graphite furnace atomic absorption spectrometry
  • Determination of Cd and Cr
  • Sample preparation
  • Dilute-and-shoot approach
  • Fish oil analysis

Cite this

Investigation of chemical modifiers for the determination of cadmium and chromium in fish oil and lipoid matrices using HR-CS GF AAS and a simple ‘dilute-and-shoot’ approach. / Schneider, Mauana ; Pereira, Éderson R; de Quadros, Daiane P.C. ; Welz, Bernhard (Corresponding Author); Carasek, Eduardo; de Andrade, Jailson B. ; Campo Menoyo, Javier Del; Feldmann, Jorg.

In: Microchemical Journal, Vol. 133, 07.2017, p. 175-181.

Research output: Contribution to journalArticle

Schneider, Mauana ; Pereira, Éderson R ; de Quadros, Daiane P.C. ; Welz, Bernhard ; Carasek, Eduardo ; de Andrade, Jailson B. ; Campo Menoyo, Javier Del ; Feldmann, Jorg. / Investigation of chemical modifiers for the determination of cadmium and chromium in fish oil and lipoid matrices using HR-CS GF AAS and a simple ‘dilute-and-shoot’ approach. In: Microchemical Journal. 2017 ; Vol. 133. pp. 175-181.
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abstract = "This work presents simple and reliable methods for the determination of Cd and Cr in fish oil and lipoid samples by high-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS). Only a simple dilution using 1-propanol was adopted as sample preparation for the determination of Cd and Cr in order to reduce the high viscosity of the lipoid samples. Pt was employed as permanent chemical modifier and Pd was used as chemical modifier in solution, added over the sample for the determination of Cd for a better performance and sensitivity. Cr was determined without a chemical modifier. The accuracy of the proposed methods was evaluated by comparison with microwave-assisted digested samples and determination by HR-CS GF AAS, showing good agreement between 2{\%} and 13{\%} for both elements without statistical difference (confidence interval of 95{\%}). The limits of detection for Cd and Cr were 0.5 pg and 7 pg, respectively, corresponding to 0.15 ng g− 1 and 2 ng g− 1, respectively. The developed methods can be described as clean, fast and accurate, which did not require any sample pre-treatment stages, such as digestion or matrix oxidation, and could be extended to different lipoid matrices, demonstrating their robustness.",
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author = "Mauana Schneider and Pereira, {{\'E}derson R} and {de Quadros}, {Daiane P.C.} and Bernhard Welz and Eduardo Carasek and {de Andrade}, {Jailson B.} and {Campo Menoyo}, {Javier Del} and Jorg Feldmann",
note = "The authors are grateful to the Conselho Nacional de Desenvolvimento Cient{\'i}fico and Tecnol{\'o}gico (CNPq), and Coordena{\cc}{\~a}o de Aperfei{\cc}oamento de Pessoal de N{\'i}vel 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 the donation of the contrAA 600.",
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T1 - Investigation of chemical modifiers for the determination of cadmium and chromium in fish oil and lipoid matrices using HR-CS GF AAS and a simple ‘dilute-and-shoot’ approach

AU - Schneider, Mauana

AU - Pereira, Éderson R

AU - de Quadros, Daiane P.C.

AU - Welz, Bernhard

AU - Carasek, Eduardo

AU - de Andrade, Jailson B.

AU - Campo Menoyo, Javier Del

AU - Feldmann, Jorg

N1 - The authors are grateful to the Conselho Nacional de Desenvolvimento Científico and 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 the donation of the contrAA 600.

PY - 2017/7

Y1 - 2017/7

N2 - This work presents simple and reliable methods for the determination of Cd and Cr in fish oil and lipoid samples by high-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS). Only a simple dilution using 1-propanol was adopted as sample preparation for the determination of Cd and Cr in order to reduce the high viscosity of the lipoid samples. Pt was employed as permanent chemical modifier and Pd was used as chemical modifier in solution, added over the sample for the determination of Cd for a better performance and sensitivity. Cr was determined without a chemical modifier. The accuracy of the proposed methods was evaluated by comparison with microwave-assisted digested samples and determination by HR-CS GF AAS, showing good agreement between 2% and 13% for both elements without statistical difference (confidence interval of 95%). The limits of detection for Cd and Cr were 0.5 pg and 7 pg, respectively, corresponding to 0.15 ng g− 1 and 2 ng g− 1, respectively. The developed methods can be described as clean, fast and accurate, which did not require any sample pre-treatment stages, such as digestion or matrix oxidation, and could be extended to different lipoid matrices, demonstrating their robustness.

AB - This work presents simple and reliable methods for the determination of Cd and Cr in fish oil and lipoid samples by high-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GF AAS). Only a simple dilution using 1-propanol was adopted as sample preparation for the determination of Cd and Cr in order to reduce the high viscosity of the lipoid samples. Pt was employed as permanent chemical modifier and Pd was used as chemical modifier in solution, added over the sample for the determination of Cd for a better performance and sensitivity. Cr was determined without a chemical modifier. The accuracy of the proposed methods was evaluated by comparison with microwave-assisted digested samples and determination by HR-CS GF AAS, showing good agreement between 2% and 13% for both elements without statistical difference (confidence interval of 95%). The limits of detection for Cd and Cr were 0.5 pg and 7 pg, respectively, corresponding to 0.15 ng g− 1 and 2 ng g− 1, respectively. The developed methods can be described as clean, fast and accurate, which did not require any sample pre-treatment stages, such as digestion or matrix oxidation, and could be extended to different lipoid matrices, demonstrating their robustness.

KW - High-resolution continuum source graphite furnace atomic absorption spectrometry

KW - Determination of Cd and Cr

KW - Sample preparation

KW - Dilute-and-shoot approach

KW - Fish oil analysis

U2 - 10.1016/j.microc.2017.03.038

DO - 10.1016/j.microc.2017.03.038

M3 - Article

VL - 133

SP - 175

EP - 181

JO - Microchemical Journal

JF - Microchemical Journal

SN - 0026-265X

ER -