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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2008
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05848547_v63_n1_p86_Pedro http://hdl.handle.net/20.500.12110/paper_05848547_v63_n1_p86_Pedro |
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paper:paper_05848547_v63_n1_p86_Pedro2025-07-30T18:19:11Z Determination of tellurium at ultra-trace levels in drinking water by on-line solid phase extraction coupled to graphite furnace atomic absorption spectrometer 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. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05848547_v63_n1_p86_Pedro 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 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. |
| 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 |
| publishDate |
2008 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05848547_v63_n1_p86_Pedro http://hdl.handle.net/20.500.12110/paper_05848547_v63_n1_p86_Pedro |
| _version_ |
1840328251613904896 |