Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water
An automatic separation preconcentration system coupled to an electrothermal (graphite furnace) atomic absorption spectrometer is described. The preconcentration step is performed on a chelating resin microcolumn (Chelex-100) placed in the injection tip of the autosampler. A time based manifold with...
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1997
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00032654_v122_n7_p679_Fernandez http://hdl.handle.net/20.500.12110/paper_00032654_v122_n7_p679_Fernandez |
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paper:paper_00032654_v122_n7_p679_Fernandez2023-06-08T14:23:53Z Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water Cadmium Electrothermal atomic absorption spectrometry Flow injection Lead Sea-water cadmium chelating agent heavy metal lead sea water analytic method argentina article atomic absorption spectrometry autoanalysis chelation controlled study flow injection analysis microcomputer standard water analysis Automatic Data Processing Cadmium Lead Seawater Sensitivity and Specificity Spectrophotometry, Atomic An automatic separation preconcentration system coupled to an electrothermal (graphite furnace) atomic absorption spectrometer is described. The preconcentration step is performed on a chelating resin microcolumn (Chelex-100) placed in the injection tip of the autosampler. A time based manifold with two- and three-way solenoid valves commanded by an eight channel microcomputer programmable controller is used for column conditioning, preconcentration and washing steps; no manual operations are involved. Elution is performed by the programmable graphite furnace autosampler and achieved in only one step. Operations involving complete and partial injection of the eluate into the graphite furnace are also discussed. The system was applied to the determination of Cd and Pb in near shore sea-water from Patagonia, Argentina. Detection limits of 1 and 8 ng 1-1 were obtained for Cd and Pb respectively. Analysis of a certified reference material (CASS-3) showed good agreement with the certified values. 1997 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00032654_v122_n7_p679_Fernandez http://hdl.handle.net/20.500.12110/paper_00032654_v122_n7_p679_Fernandez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Cadmium Electrothermal atomic absorption spectrometry Flow injection Lead Sea-water cadmium chelating agent heavy metal lead sea water analytic method argentina article atomic absorption spectrometry autoanalysis chelation controlled study flow injection analysis microcomputer standard water analysis Automatic Data Processing Cadmium Lead Seawater Sensitivity and Specificity Spectrophotometry, Atomic |
| spellingShingle |
Cadmium Electrothermal atomic absorption spectrometry Flow injection Lead Sea-water cadmium chelating agent heavy metal lead sea water analytic method argentina article atomic absorption spectrometry autoanalysis chelation controlled study flow injection analysis microcomputer standard water analysis Automatic Data Processing Cadmium Lead Seawater Sensitivity and Specificity Spectrophotometry, Atomic Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water |
| topic_facet |
Cadmium Electrothermal atomic absorption spectrometry Flow injection Lead Sea-water cadmium chelating agent heavy metal lead sea water analytic method argentina article atomic absorption spectrometry autoanalysis chelation controlled study flow injection analysis microcomputer standard water analysis Automatic Data Processing Cadmium Lead Seawater Sensitivity and Specificity Spectrophotometry, Atomic |
| description |
An automatic separation preconcentration system coupled to an electrothermal (graphite furnace) atomic absorption spectrometer is described. The preconcentration step is performed on a chelating resin microcolumn (Chelex-100) placed in the injection tip of the autosampler. A time based manifold with two- and three-way solenoid valves commanded by an eight channel microcomputer programmable controller is used for column conditioning, preconcentration and washing steps; no manual operations are involved. Elution is performed by the programmable graphite furnace autosampler and achieved in only one step. Operations involving complete and partial injection of the eluate into the graphite furnace are also discussed. The system was applied to the determination of Cd and Pb in near shore sea-water from Patagonia, Argentina. Detection limits of 1 and 8 ng 1-1 were obtained for Cd and Pb respectively. Analysis of a certified reference material (CASS-3) showed good agreement with the certified values. |
| title |
Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water |
| title_short |
Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water |
| title_full |
Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water |
| title_fullStr |
Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water |
| title_full_unstemmed |
Fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: Determination of cadmium and lead in sea-water |
| title_sort |
fully automatic on-line separation preconcentration system for electrothermal atomic absorption spectrometry: determination of cadmium and lead in sea-water |
| publishDate |
1997 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00032654_v122_n7_p679_Fernandez http://hdl.handle.net/20.500.12110/paper_00032654_v122_n7_p679_Fernandez |
| _version_ |
1768542482389270528 |