The University of Southampton
University of Southampton Institutional Repository

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

Determination of Se and Te in coal at ultra-trace levels by ICP-MS after microwave-induced combustion
Determination of Se and Te in coal at ultra-trace levels by ICP-MS after microwave-induced combustion
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 HNO3 + 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 HNO3 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 kg1 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 mg L1), 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 kg1, and Te was mainly found at ultra-trace levels (<0.007 to 0.11 mg kg1). 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.
0267-9477
998-1004
Rondan, Filipe S.
46ec2bac-974f-4e16-8220-467d83be13bb
Henn, Alessandra S.
4385c414-980a-4fd5-b2e8-d6c2a981ceb3
Mello, Paola A.
2b9904d6-90d2-43c4-9b2a-706246f982a1
Perez, Magali
496b62b9-ca3a-4b78-aaf7-4d14627f5771
Bullock, Liam
c6ffb9b0-0a54-4ab2-9edb-f97280e6ce2d
Parnell, John
b86302b0-b930-4b7c-9786-13abc612fef7
Feldmann, Joerg
301ee755-b3df-4b0e-9c5e-3ca0f7d1ccc5
Flores, Erico M.M.
a8dfa94e-cc36-4e44-af89-566ea628251b
Mesko, Marcia F.
58af62ba-c148-4a64-8c65-a69bfc501f55
Rondan, Filipe S.
46ec2bac-974f-4e16-8220-467d83be13bb
Henn, Alessandra S.
4385c414-980a-4fd5-b2e8-d6c2a981ceb3
Mello, Paola A.
2b9904d6-90d2-43c4-9b2a-706246f982a1
Perez, Magali
496b62b9-ca3a-4b78-aaf7-4d14627f5771
Bullock, Liam
c6ffb9b0-0a54-4ab2-9edb-f97280e6ce2d
Parnell, John
b86302b0-b930-4b7c-9786-13abc612fef7
Feldmann, Joerg
301ee755-b3df-4b0e-9c5e-3ca0f7d1ccc5
Flores, Erico M.M.
a8dfa94e-cc36-4e44-af89-566ea628251b
Mesko, Marcia F.
58af62ba-c148-4a64-8c65-a69bfc501f55

Rondan, Filipe S., Henn, Alessandra S., Mello, Paola A., Perez, Magali, Bullock, Liam, Parnell, John, Feldmann, Joerg, Flores, Erico M.M. and Mesko, Marcia F. (2019) Determination of Se and Te in coal at ultra-trace levels by ICP-MS after microwave-induced combustion. Journal of Analytical Atomic Spectrometry, 34 (5), 998-1004. (doi:10.1039/C9JA00048H).

Record type: Article

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 HNO3 + 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 HNO3 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 kg1 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 mg L1), 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 kg1, and Te was mainly found at ultra-trace levels (<0.007 to 0.11 mg kg1). 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.

Text
Manuscript- Se-and-Te-in-Coal-MIC-ICP-MS - Accepted Manuscript
Restricted to Repository staff only until 28 February 2020.
Request a copy
Text
Rondan et al 2019 Se-Te JAAS - Version of Record
Restricted to Repository staff only
Request a copy

More information

Accepted/In Press date: 27 February 2019
e-pub ahead of print date: 28 February 2019
Published date: May 2019

Identifiers

Local EPrints ID: 431419
URI: https://eprints.soton.ac.uk/id/eprint/431419
ISSN: 0267-9477
PURE UUID: d9f96935-a878-4465-8606-126a284689f5

Catalogue record

Date deposited: 31 May 2019 16:30
Last modified: 07 Nov 2019 17:30

Export record

Altmetrics

Contributors

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

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×