Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer

In this paper, two time-based flow injection (FI) separation pre-concentration systems coupled to graphite furnace atomic absorption spectrometry (GFAAS) for tellurium determination are studied and compared. The first alternative involves the pre-concentration of the analyte onto Dowex 1X8 employed...

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Autores principales: Pedro, J., Stripekis, J., Bonivardi, A., Tudino, M.
Formato: JOUR
Materias:
Electrothermal atomic absorption spectrometry
Flow injection
On-line solid phase extraction
Tellurium determination
Atomic absorption spectrometry
Flow separation
Graphite
Potable water
Resins
Tellurium compounds
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_05848547_v63_n1_p86_Pedro
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_05848547_v63_n1_p86_Pedro2023-10-03T15:36:04Z Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer Pedro, J. Stripekis, J. Bonivardi, A. Tudino, M. Electrothermal atomic absorption spectrometry Flow injection On-line solid phase extraction Tellurium determination Atomic absorption spectrometry Flow separation Graphite Potable water Resins Electrothermal atomic absorption spectrometry Flow injection On-line solid phase extraction Tellurium determination Tellurium compounds In this paper, two time-based flow injection (FI) separation pre-concentration systems coupled to graphite furnace atomic absorption spectrometry (GFAAS) for tellurium determination are studied and compared. The first alternative involves the pre-concentration of the analyte onto Dowex 1X8 employed as packaging material of a micro-column inserted in the flow system. The second set-up is based on the co-precipitation of tellurium with La(OH)3 followed by retention onto XAD resins. Both systems are compared in terms of limit of detection, linear range, RSD%, sample throughput, micro-columns lifetime and aptitude for fully automatic operation. The features of the Dowex system are: 37% efficiency of retention and an enhancement factor of 42 for a pre-concentration time of 180 seconds (sample flow rate = 3 ml min- 1) with acetic acid elution volumes of 80 μl. The detection limit (3 s) is 7 ng l- 1 and the relative standard deviation (n = 7200 ng l- 1) is 5.8%. The analytical performance of the XAD system is: 72% efficiency of retention and an enhancement factor of 25 for a pre-concentration time of 180 s (sample flow rate = 3 ml min- 1) with nitric acid elution volumes of 300 μl. The detection limit is 66 ng l- 1 and the relative standard deviation (n = 7200 ng l- 1) is 8.3%. Applications to the determination of tellurium in tap water and the validation of the analytical methodology employing SRM 1643e as certified reference material are shown. © 2007 Elsevier B.V. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_05848547_v63_n1_p86_Pedro
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Electrothermal atomic absorption spectrometry
Flow injection
On-line solid phase extraction
Tellurium determination
Atomic absorption spectrometry
Flow separation
Graphite
Potable water
Resins
Electrothermal atomic absorption spectrometry
Flow injection
On-line solid phase extraction
Tellurium determination
Tellurium compounds
spellingShingle Electrothermal atomic absorption spectrometry
Flow injection
On-line solid phase extraction
Tellurium determination
Atomic absorption spectrometry
Flow separation
Graphite
Potable water
Resins
Electrothermal atomic absorption spectrometry
Flow injection
On-line solid phase extraction
Tellurium determination
Tellurium compounds
Pedro, J.
Stripekis, J.
Bonivardi, A.
Tudino, M.
Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer
topic_facet Electrothermal atomic absorption spectrometry
Flow injection
On-line solid phase extraction
Tellurium determination
Atomic absorption spectrometry
Flow separation
Graphite
Potable water
Resins
Electrothermal atomic absorption spectrometry
Flow injection
On-line solid phase extraction
Tellurium determination
Tellurium compounds
description In this paper, two time-based flow injection (FI) separation pre-concentration systems coupled to graphite furnace atomic absorption spectrometry (GFAAS) for tellurium determination are studied and compared. The first alternative involves the pre-concentration of the analyte onto Dowex 1X8 employed as packaging material of a micro-column inserted in the flow system. The second set-up is based on the co-precipitation of tellurium with La(OH)3 followed by retention onto XAD resins. Both systems are compared in terms of limit of detection, linear range, RSD%, sample throughput, micro-columns lifetime and aptitude for fully automatic operation. The features of the Dowex system are: 37% efficiency of retention and an enhancement factor of 42 for a pre-concentration time of 180 seconds (sample flow rate = 3 ml min- 1) with acetic acid elution volumes of 80 μl. The detection limit (3 s) is 7 ng l- 1 and the relative standard deviation (n = 7200 ng l- 1) is 5.8%. The analytical performance of the XAD system is: 72% efficiency of retention and an enhancement factor of 25 for a pre-concentration time of 180 s (sample flow rate = 3 ml min- 1) with nitric acid elution volumes of 300 μl. The detection limit is 66 ng l- 1 and the relative standard deviation (n = 7200 ng l- 1) is 8.3%. Applications to the determination of tellurium in tap water and the validation of the analytical methodology employing SRM 1643e as certified reference material are shown. © 2007 Elsevier B.V. All rights reserved.
format JOUR
author Pedro, J.
Stripekis, J.
Bonivardi, A.
Tudino, M.
author_facet Pedro, J.
Stripekis, J.
Bonivardi, A.
Tudino, M.
author_sort Pedro, J.
title Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer
title_short Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer
title_full Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer
title_fullStr Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer
title_full_unstemmed Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer
title_sort determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer
url http://hdl.handle.net/20.500.12110/paper_05848547_v63_n1_p86_Pedro
work_keys_str_mv AT pedroj determinationoftelluriumatultratracelevelsindrinkingwaterbyonlinesolidphaseextractioncoupledtographitefurnaceatomicabsorptionspectrometer
AT stripekisj determinationoftelluriumatultratracelevelsindrinkingwaterbyonlinesolidphaseextractioncoupledtographitefurnaceatomicabsorptionspectrometer
AT bonivardia determinationoftelluriumatultratracelevelsindrinkingwaterbyonlinesolidphaseextractioncoupledtographitefurnaceatomicabsorptionspectrometer
AT tudinom determinationoftelluriumatultratracelevelsindrinkingwaterbyonlinesolidphaseextractioncoupledtographitefurnaceatomicabsorptionspectrometer
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