Determination of Se at low concentration in coal by collision/reaction cell technology inductively coupled plasma mass spectrometry

Alessandra S. Henn, Filipe S. Rondan, Marcia F. Mesko, Paola A. Mello, Magali Perez, Joseph Armstrong, Liam A. Bullock, John Parnell, Joerg Feldmann, Erico M.M. Flores

Research output: Contribution to journalArticle

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Abstract

A method is proposed for the determination of selenium at low concentration in coal by collision/reaction cell technology inductively coupled plasma mass spectrometry (CRC-ICP-MS). Samples were decomposed by high pressure microwave-assisted wet digestion (MAWD) using 250 mg of coal, a mixture of 5 mL of 14.4 mol L−1 HNO3 and 1 mL of 40% HF and 70 min of heating program (200 °C and 40 bar). Hydrogen gas used in the collision/reaction cell was investigated to minimize the argon-based interferences at m/z 77, 78 and 80. The rejection parameter (RPq) and the H2 gas flow rate were set to 0.45 and 4.8 mL min−1, respectively. The use of H2 in the cell resulted in other polyatomic interferences, such as 76Ge1H+, 79Br1H+ and 81Br1H+, which impaired Se determination using 77Se, 80Se and 82Se isotopes, thus Se determination was carried out by monitoring only 78Se isotope. Selenium was determined in certified reference materials of coal (NIST 1635 and SARM 20) and an agreement better than 95% was observed between the results obtained by CRC-ICP-MS and the certified values. Under optimized conditions, the instrumental limit of detection was 0.01 μg L−1 and the method limit of detection was 0.01 μg g−1, which was suitable for Se determination at very low concentration in coal.

Original languageEnglish
Pages (from-to)48-54
Number of pages7
JournalSpectrochimica Acta - Part B Atomic Spectroscopy
Volume143
Early online date27 Feb 2018
DOIs
Publication statusPublished - May 2018

Fingerprint

Inductively coupled plasma mass spectrometry
inductively coupled plasma mass spectrometry
Coal
coal
low concentrations
collisions
Selenium
selenium
cells
Isotopes
isotopes
interference
Argon
rejection
gas flow
Flow of gases
Hydrogen
flow velocity
Gases
Microwaves

Keywords

  • Coal
  • Collision/reaction cell
  • CRC-ICP-MS
  • Selenium determination
  • Selenium interferences

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

Cite this

Determination of Se at low concentration in coal by collision/reaction cell technology inductively coupled plasma mass spectrometry. / Henn, Alessandra S.; Rondan, Filipe S.; Mesko, Marcia F.; Mello, Paola A.; Perez, Magali; Armstrong, Joseph; Bullock, Liam A.; Parnell, John; Feldmann, Joerg; Flores, Erico M.M.

In: Spectrochimica Acta - Part B Atomic Spectroscopy, Vol. 143, 05.2018, p. 48-54.

Research output: Contribution to journalArticle

Henn, Alessandra S. ; Rondan, Filipe S. ; Mesko, Marcia F. ; Mello, Paola A. ; Perez, Magali ; Armstrong, Joseph ; Bullock, Liam A. ; Parnell, John ; Feldmann, Joerg ; Flores, Erico M.M. / Determination of Se at low concentration in coal by collision/reaction cell technology inductively coupled plasma mass spectrometry. In: Spectrochimica Acta - Part B Atomic Spectroscopy. 2018 ; Vol. 143. pp. 48-54.
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title = "Determination of Se at low concentration in coal by collision/reaction cell technology inductively coupled plasma mass spectrometry",
abstract = "A method is proposed for the determination of selenium at low concentration in coal by collision/reaction cell technology inductively coupled plasma mass spectrometry (CRC-ICP-MS). Samples were decomposed by high pressure microwave-assisted wet digestion (MAWD) using 250 mg of coal, a mixture of 5 mL of 14.4 mol L−1 HNO3 and 1 mL of 40{\%} HF and 70 min of heating program (200 °C and 40 bar). Hydrogen gas used in the collision/reaction cell was investigated to minimize the argon-based interferences at m/z 77, 78 and 80. The rejection parameter (RPq) and the H2 gas flow rate were set to 0.45 and 4.8 mL min−1, respectively. The use of H2 in the cell resulted in other polyatomic interferences, such as 76Ge1H+, 79Br1H+ and 81Br1H+, which impaired Se determination using 77Se, 80Se and 82Se isotopes, thus Se determination was carried out by monitoring only 78Se isotope. Selenium was determined in certified reference materials of coal (NIST 1635 and SARM 20) and an agreement better than 95{\%} was observed between the results obtained by CRC-ICP-MS and the certified values. Under optimized conditions, the instrumental limit of detection was 0.01 μg L−1 and the method limit of detection was 0.01 μg g−1, which was suitable for Se determination at very low concentration in coal.",
keywords = "Coal, Collision/reaction cell, CRC-ICP-MS, Selenium determination, Selenium interferences",
author = "Henn, {Alessandra S.} and Rondan, {Filipe S.} and Mesko, {Marcia F.} and Mello, {Paola A.} and Magali Perez and Joseph Armstrong and Bullock, {Liam A.} and John Parnell and Joerg Feldmann and Flores, {Erico M.M.}",
note = "The authors are grateful to Conselho Nacional de Desenvolvimento Cient{\'i}fico e Tecnol{\'o}gico (CNPq, Grant 309297/2016-8), Instituto Nacional de Ci{\^e}ncia e Tecnologia de Bioanal{\'i}tica – INCTBio (CNPq Grant Nr. 573672/2008-3) and Funda{\cc}{\~a}o de Amparo {\`a} Pesquisa do Estado do Rio Grande do Sul (FAPERGS, Grants16/2551-0000 (182-0) and 16/2551-0000516-8) for supporting this study. Funding for the sample collection provided by NERC Security of Supply programme UK (grant NE/L001764/1).",
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T1 - Determination of Se at low concentration in coal by collision/reaction cell technology inductively coupled plasma mass spectrometry

AU - Henn, Alessandra S.

AU - Rondan, Filipe S.

AU - Mesko, Marcia F.

AU - Mello, Paola A.

AU - Perez, Magali

AU - Armstrong, Joseph

AU - Bullock, Liam A.

AU - Parnell, John

AU - Feldmann, Joerg

AU - Flores, Erico M.M.

N1 - The authors are grateful to Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Grant 309297/2016-8), Instituto Nacional de Ciência e Tecnologia de Bioanalítica – INCTBio (CNPq Grant Nr. 573672/2008-3) and Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (FAPERGS, Grants16/2551-0000 (182-0) and 16/2551-0000516-8) for supporting this study. Funding for the sample collection provided by NERC Security of Supply programme UK (grant NE/L001764/1).

PY - 2018/5

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N2 - A method is proposed for the determination of selenium at low concentration in coal by collision/reaction cell technology inductively coupled plasma mass spectrometry (CRC-ICP-MS). Samples were decomposed by high pressure microwave-assisted wet digestion (MAWD) using 250 mg of coal, a mixture of 5 mL of 14.4 mol L−1 HNO3 and 1 mL of 40% HF and 70 min of heating program (200 °C and 40 bar). Hydrogen gas used in the collision/reaction cell was investigated to minimize the argon-based interferences at m/z 77, 78 and 80. The rejection parameter (RPq) and the H2 gas flow rate were set to 0.45 and 4.8 mL min−1, respectively. The use of H2 in the cell resulted in other polyatomic interferences, such as 76Ge1H+, 79Br1H+ and 81Br1H+, which impaired Se determination using 77Se, 80Se and 82Se isotopes, thus Se determination was carried out by monitoring only 78Se isotope. Selenium was determined in certified reference materials of coal (NIST 1635 and SARM 20) and an agreement better than 95% was observed between the results obtained by CRC-ICP-MS and the certified values. Under optimized conditions, the instrumental limit of detection was 0.01 μg L−1 and the method limit of detection was 0.01 μg g−1, which was suitable for Se determination at very low concentration in coal.

AB - A method is proposed for the determination of selenium at low concentration in coal by collision/reaction cell technology inductively coupled plasma mass spectrometry (CRC-ICP-MS). Samples were decomposed by high pressure microwave-assisted wet digestion (MAWD) using 250 mg of coal, a mixture of 5 mL of 14.4 mol L−1 HNO3 and 1 mL of 40% HF and 70 min of heating program (200 °C and 40 bar). Hydrogen gas used in the collision/reaction cell was investigated to minimize the argon-based interferences at m/z 77, 78 and 80. The rejection parameter (RPq) and the H2 gas flow rate were set to 0.45 and 4.8 mL min−1, respectively. The use of H2 in the cell resulted in other polyatomic interferences, such as 76Ge1H+, 79Br1H+ and 81Br1H+, which impaired Se determination using 77Se, 80Se and 82Se isotopes, thus Se determination was carried out by monitoring only 78Se isotope. Selenium was determined in certified reference materials of coal (NIST 1635 and SARM 20) and an agreement better than 95% was observed between the results obtained by CRC-ICP-MS and the certified values. Under optimized conditions, the instrumental limit of detection was 0.01 μg L−1 and the method limit of detection was 0.01 μg g−1, which was suitable for Se determination at very low concentration in coal.

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DO - 10.1016/j.sab.2018.02.014

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JO - Spectrochimica Acta. Part B: Atomic Spectroscopy

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