Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry
In this work, a non-chromatographic procedure for the on-line determination of ultratraces of V(V) and V(IV) is presented. The method involves a solid phase extraction-flow injection system coupled to electrothermal atomic absorption spectrometry (SPE-FI-ETAAS). The system holds two microcolumns (MC...
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2009
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00399140_v79_n3_p940_Kim http://hdl.handle.net/20.500.12110/paper_00399140_v79_n3_p940_Kim |
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paper:paper_00399140_v79_n3_p940_Kim2023-06-08T15:03:44Z Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry Electrothermal atomic absorption spectrometry Hybrid mesoporous silica Solid phase extraction V(IV) V(V) Absorption spectroscopy Atomic absorption spectrometry Atoms Chlorine compounds Chromatography Electric heating Mesoporous materials Phase separation Phase shifters Silica Sorption Certified reference materials Chromatographic determination Chromatographic procedure Electrothermal atomic absorption spectrometry Flow-injection system Mesoporous Silica Mesoporous silica MCM-41 Solid-phase extraction Extraction In this work, a non-chromatographic procedure for the on-line determination of ultratraces of V(V) and V(IV) is presented. The method involves a solid phase extraction-flow injection system coupled to electrothermal atomic absorption spectrometry (SPE-FI-ETAAS). The system holds two microcolumns (MC) set in parallel and filled with lab-made mesoporous silica functionalized with 3-aminopropyltriethoxy silane (APS) and mesoporous silica MCM-41, respectively. The pre-concentration of V(V) is performed by sorption onto the first MC (C1) filled with APS at pH 3, whilst that of V(IV) is performed by sorption onto the second column (C2) filled with mesoporous silica MCM-41 at pH 5. Aqueous samples containing both analytes are loaded and, after pre-concentration (pre-concentration factor PCF = 10, sorption flow rate = 1 mL min-1, sorption time = 10 min), they are eluted in separate vessels with hydroxylammonium chloride (HC) 0.1 mol L-1 in HCl 0.5 mol L-1 (elution volume = 1 mL, elution flow rate = 0.5 mL min-1). Afterwards, both analytes are determined through ETAAS with graphite furnace. Under optimized conditions, the main analytical figures of merit for V(V) and V(IV) are, respectively: detection limits (3 s): 0.5 and 0.6 μg L-1, linear range: 2-100 μg L-1 (both analytes), sensitivity: 0.015 and 0.013 μg-1 L and sample throughput: 6 h-1 (both analytes). Recoveries of both species were assayed in different water samples. Validation was performed through certified reference materials for ultratraces of total vanadium in river water. © 2009 Elsevier B.V. All rights reserved. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00399140_v79_n3_p940_Kim http://hdl.handle.net/20.500.12110/paper_00399140_v79_n3_p940_Kim |
| 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 Hybrid mesoporous silica Solid phase extraction V(IV) V(V) Absorption spectroscopy Atomic absorption spectrometry Atoms Chlorine compounds Chromatography Electric heating Mesoporous materials Phase separation Phase shifters Silica Sorption Certified reference materials Chromatographic determination Chromatographic procedure Electrothermal atomic absorption spectrometry Flow-injection system Mesoporous Silica Mesoporous silica MCM-41 Solid-phase extraction Extraction |
| spellingShingle |
Electrothermal atomic absorption spectrometry Hybrid mesoporous silica Solid phase extraction V(IV) V(V) Absorption spectroscopy Atomic absorption spectrometry Atoms Chlorine compounds Chromatography Electric heating Mesoporous materials Phase separation Phase shifters Silica Sorption Certified reference materials Chromatographic determination Chromatographic procedure Electrothermal atomic absorption spectrometry Flow-injection system Mesoporous Silica Mesoporous silica MCM-41 Solid-phase extraction Extraction Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry |
| topic_facet |
Electrothermal atomic absorption spectrometry Hybrid mesoporous silica Solid phase extraction V(IV) V(V) Absorption spectroscopy Atomic absorption spectrometry Atoms Chlorine compounds Chromatography Electric heating Mesoporous materials Phase separation Phase shifters Silica Sorption Certified reference materials Chromatographic determination Chromatographic procedure Electrothermal atomic absorption spectrometry Flow-injection system Mesoporous Silica Mesoporous silica MCM-41 Solid-phase extraction Extraction |
| description |
In this work, a non-chromatographic procedure for the on-line determination of ultratraces of V(V) and V(IV) is presented. The method involves a solid phase extraction-flow injection system coupled to electrothermal atomic absorption spectrometry (SPE-FI-ETAAS). The system holds two microcolumns (MC) set in parallel and filled with lab-made mesoporous silica functionalized with 3-aminopropyltriethoxy silane (APS) and mesoporous silica MCM-41, respectively. The pre-concentration of V(V) is performed by sorption onto the first MC (C1) filled with APS at pH 3, whilst that of V(IV) is performed by sorption onto the second column (C2) filled with mesoporous silica MCM-41 at pH 5. Aqueous samples containing both analytes are loaded and, after pre-concentration (pre-concentration factor PCF = 10, sorption flow rate = 1 mL min-1, sorption time = 10 min), they are eluted in separate vessels with hydroxylammonium chloride (HC) 0.1 mol L-1 in HCl 0.5 mol L-1 (elution volume = 1 mL, elution flow rate = 0.5 mL min-1). Afterwards, both analytes are determined through ETAAS with graphite furnace. Under optimized conditions, the main analytical figures of merit for V(V) and V(IV) are, respectively: detection limits (3 s): 0.5 and 0.6 μg L-1, linear range: 2-100 μg L-1 (both analytes), sensitivity: 0.015 and 0.013 μg-1 L and sample throughput: 6 h-1 (both analytes). Recoveries of both species were assayed in different water samples. Validation was performed through certified reference materials for ultratraces of total vanadium in river water. © 2009 Elsevier B.V. All rights reserved. |
| title |
Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry |
| title_short |
Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry |
| title_full |
Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry |
| title_fullStr |
Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry |
| title_full_unstemmed |
Non-chromatographic determination of ultratraces of V(V) and V(IV) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry |
| title_sort |
non-chromatographic determination of ultratraces of v(v) and v(iv) based on a double column solid phase extraction flow injection system coupled to electrothermal atomic absorption spectrometry |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00399140_v79_n3_p940_Kim http://hdl.handle.net/20.500.12110/paper_00399140_v79_n3_p940_Kim |
| _version_ |
1768545776585146368 |