Determination of Se and Te in coal at ultra-trace levels by ICP-MS after microwave-induced combustion

Filipe S. Rondan, Alessandra S. Henn, Paola A. Mello, Magali Perez, Liam A. Bullock, John Parnell, Joerg Feldmann, Erico M. M. Flores, Marcia F. Mesko* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A method for ultra-trace determination of Se and Te in coal by inductively coupled plasma mass spectrometry (ICP-MS) was developed. Samples (up to 500 mg) were prepared by microwave-induced combustion (MIC) in a closed system pressurized with 20 bar of oxygen. Inorganic acids or their mixtures were evaluated as absorbing solution. Using HNO 3 + HCl (1 + 1), results obtained for Se and Te after sample preparation by MIC agreed with those obtained by reference methods, microwave-assisted wet digestion (MAWD) using concentrated HNO 3 and HF, and solid sampling electrothermal vaporization inductively coupled plasma mass spectrometry (SS-ETV-ICP-MS), and also with a certified reference material of coal (NIST 1632c) for Se. Very low limits of quantification (LOQ) were obtained: 0.002 and 0.007 mg kg -1 for Se and Te, respectively. Major elements were determined in final solutions obtained by MAWD and MIC, and their concentration in solutions of MIC was negligible (<10 μg L -1 ), minimizing the risk of interference in ICP-MS analysis. The proposed method was applied to samples of coal from the United Kingdom, with a wide range of inorganic composition (from 3 to 41% ash content), showing its robustness and feasibility for routine analysis. Se concentration ranged from 0.291 to 11.5 mg kg -1 , and Te was mainly found at ultra-trace levels (<0.007 to 0.11 mg kg -1 ). The proposed method presents several advantages over the reference methods, such as the use of a higher sample mass, low LOQs and, an important aspect, no need of using HF.

Original languageEnglish
Pages (from-to)998-1004
Number of pages7
JournalJournal of Analytical Atomic Spectrometry
Volume34
Issue number5
Early online date28 Feb 2019
DOIs
Publication statusPublished - 1 May 2019

Fingerprint

Inductively coupled plasma mass spectrometry
Coal
Microwaves
Ashes
Inorganic acids
Vaporization
Oxygen
Sampling
Chemical analysis

Keywords

  • SAMPLE PREPARATION
  • TOXIC ELEMENTS
  • DIGESTION
  • FEASIBILITY
  • IMPURITIES
  • STRATEGIES
  • TELLURIUM
  • HALOGENS
  • SELENIUM
  • SULFUR

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

Cite this

Determination of Se and Te in coal at ultra-trace levels by ICP-MS after microwave-induced combustion. / Rondan, Filipe S.; Henn, Alessandra S.; Mello, Paola A.; Perez, Magali; Bullock, Liam A.; Parnell, John; Feldmann, Joerg; Flores, Erico M. M.; Mesko, Marcia F. (Corresponding Author).

In: Journal of Analytical Atomic Spectrometry, Vol. 34, No. 5, 01.05.2019, p. 998-1004.

Research output: Contribution to journalArticle

Rondan, Filipe S. ; Henn, Alessandra S. ; Mello, Paola A. ; Perez, Magali ; Bullock, Liam A. ; Parnell, John ; Feldmann, Joerg ; Flores, Erico M. M. ; Mesko, Marcia F. / Determination of Se and Te in coal at ultra-trace levels by ICP-MS after microwave-induced combustion. In: Journal of Analytical Atomic Spectrometry. 2019 ; Vol. 34, No. 5. pp. 998-1004.
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abstract = "A method for ultra-trace determination of Se and Te in coal by inductively coupled plasma mass spectrometry (ICP-MS) was developed. Samples (up to 500 mg) were prepared by microwave-induced combustion (MIC) in a closed system pressurized with 20 bar of oxygen. Inorganic acids or their mixtures were evaluated as absorbing solution. Using HNO 3 + HCl (1 + 1), results obtained for Se and Te after sample preparation by MIC agreed with those obtained by reference methods, microwave-assisted wet digestion (MAWD) using concentrated HNO 3 and HF, and solid sampling electrothermal vaporization inductively coupled plasma mass spectrometry (SS-ETV-ICP-MS), and also with a certified reference material of coal (NIST 1632c) for Se. Very low limits of quantification (LOQ) were obtained: 0.002 and 0.007 mg kg -1 for Se and Te, respectively. Major elements were determined in final solutions obtained by MAWD and MIC, and their concentration in solutions of MIC was negligible (<10 μg L -1 ), minimizing the risk of interference in ICP-MS analysis. The proposed method was applied to samples of coal from the United Kingdom, with a wide range of inorganic composition (from 3 to 41{\%} ash content), showing its robustness and feasibility for routine analysis. Se concentration ranged from 0.291 to 11.5 mg kg -1 , and Te was mainly found at ultra-trace levels (<0.007 to 0.11 mg kg -1 ). The proposed method presents several advantages over the reference methods, such as the use of a higher sample mass, low LOQs and, an important aspect, no need of using HF.",
keywords = "SAMPLE PREPARATION, TOXIC ELEMENTS, DIGESTION, FEASIBILITY, IMPURITIES, STRATEGIES, TELLURIUM, HALOGENS, SELENIUM, SULFUR",
author = "Rondan, {Filipe S.} and Henn, {Alessandra S.} and Mello, {Paola A.} and Magali Perez and Bullock, {Liam A.} and John Parnell and Joerg Feldmann and Flores, {Erico M. M.} and Mesko, {Marcia F.}",
note = "This study was financed in part by the Coordena{\cc}{\~a}o de Aperfei{\cc}oamento de Pessoal de N{\'i}vel Superior – Brasil (CAPES) – Finance Code 001. The authors are also grateful to the 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 No. 573672/2008-3) and Funda{\cc}{\~a}o de Amparo {\`a} Pesquisa do Estado do Rio Grande do Sul (FAPERGS, Grant 16/2551-0000516-8) for supporting this study. Funding for the sample collection provided by the NERC Security of Supply programme UK (grant NE/L001764/1) is acknowledged.",
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T1 - Determination of Se and Te in coal at ultra-trace levels by ICP-MS after microwave-induced combustion

AU - Rondan, Filipe S.

AU - Henn, Alessandra S.

AU - Mello, Paola A.

AU - Perez, Magali

AU - Bullock, Liam A.

AU - Parnell, John

AU - Feldmann, Joerg

AU - Flores, Erico M. M.

AU - Mesko, Marcia F.

N1 - This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001. The authors are also grateful to the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Grant 309297/2016-8), Instituto Nacional de Ciência e Tecnologia de Bioanalítica – INCTBio (CNPq Grant No. 573672/2008-3) and Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (FAPERGS, Grant 16/2551-0000516-8) for supporting this study. Funding for the sample collection provided by the NERC Security of Supply programme UK (grant NE/L001764/1) is acknowledged.

PY - 2019/5/1

Y1 - 2019/5/1

N2 - A method for ultra-trace determination of Se and Te in coal by inductively coupled plasma mass spectrometry (ICP-MS) was developed. Samples (up to 500 mg) were prepared by microwave-induced combustion (MIC) in a closed system pressurized with 20 bar of oxygen. Inorganic acids or their mixtures were evaluated as absorbing solution. Using HNO 3 + HCl (1 + 1), results obtained for Se and Te after sample preparation by MIC agreed with those obtained by reference methods, microwave-assisted wet digestion (MAWD) using concentrated HNO 3 and HF, and solid sampling electrothermal vaporization inductively coupled plasma mass spectrometry (SS-ETV-ICP-MS), and also with a certified reference material of coal (NIST 1632c) for Se. Very low limits of quantification (LOQ) were obtained: 0.002 and 0.007 mg kg -1 for Se and Te, respectively. Major elements were determined in final solutions obtained by MAWD and MIC, and their concentration in solutions of MIC was negligible (<10 μg L -1 ), minimizing the risk of interference in ICP-MS analysis. The proposed method was applied to samples of coal from the United Kingdom, with a wide range of inorganic composition (from 3 to 41% ash content), showing its robustness and feasibility for routine analysis. Se concentration ranged from 0.291 to 11.5 mg kg -1 , and Te was mainly found at ultra-trace levels (<0.007 to 0.11 mg kg -1 ). The proposed method presents several advantages over the reference methods, such as the use of a higher sample mass, low LOQs and, an important aspect, no need of using HF.

AB - A method for ultra-trace determination of Se and Te in coal by inductively coupled plasma mass spectrometry (ICP-MS) was developed. Samples (up to 500 mg) were prepared by microwave-induced combustion (MIC) in a closed system pressurized with 20 bar of oxygen. Inorganic acids or their mixtures were evaluated as absorbing solution. Using HNO 3 + HCl (1 + 1), results obtained for Se and Te after sample preparation by MIC agreed with those obtained by reference methods, microwave-assisted wet digestion (MAWD) using concentrated HNO 3 and HF, and solid sampling electrothermal vaporization inductively coupled plasma mass spectrometry (SS-ETV-ICP-MS), and also with a certified reference material of coal (NIST 1632c) for Se. Very low limits of quantification (LOQ) were obtained: 0.002 and 0.007 mg kg -1 for Se and Te, respectively. Major elements were determined in final solutions obtained by MAWD and MIC, and their concentration in solutions of MIC was negligible (<10 μg L -1 ), minimizing the risk of interference in ICP-MS analysis. The proposed method was applied to samples of coal from the United Kingdom, with a wide range of inorganic composition (from 3 to 41% ash content), showing its robustness and feasibility for routine analysis. Se concentration ranged from 0.291 to 11.5 mg kg -1 , and Te was mainly found at ultra-trace levels (<0.007 to 0.11 mg kg -1 ). The proposed method presents several advantages over the reference methods, such as the use of a higher sample mass, low LOQs and, an important aspect, no need of using HF.

KW - SAMPLE PREPARATION

KW - TOXIC ELEMENTS

KW - DIGESTION

KW - FEASIBILITY

KW - IMPURITIES

KW - STRATEGIES

KW - TELLURIUM

KW - HALOGENS

KW - SELENIUM

KW - SULFUR

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UR - http://www.mendeley.com/research/determination-se-te-coal-ultratrace-levels-icpms-after-microwaveinduced-combustion

U2 - 10.1039/c9ja00048h

DO - 10.1039/c9ja00048h

M3 - Article

VL - 34

SP - 998

EP - 1004

JO - Journal of Analytical Atomic Spectrometry

JF - Journal of Analytical Atomic Spectrometry

SN - 0267-9477

IS - 5

ER -