Bulska, Ewa ; Thybusch, Brunhilde ; Ortner, Hugo M. (2001)
Surface and subsurface examination of graphite tubes after electrodeposition of noble metals for electrothermal atomic absorption spectrometry.
In: Spectrochimica Acta Part B: Atomic Spectroscopy, 56 (4)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The modification phenomena of noble metals (Pd, Ir, Rh) electrodeposited onto the inner surface of pyrolytic graphite (PG) coated furnaces were investigated mainly by electron microprobe analysis with energy dispersive X-ray emission detection. The conditions of electrodeposition were optimized in order to achieve the best analytical performance of atomic absorption measurements. Investigations concerning the distribution of noble metals on the tube surface and in-depth were performed at different stages of the tube history. It was found that the noble metals used for the modification do not form a compact layer on the surface but penetrate into the pyrolytic graphite structure already at the deposition step. When two metals were deposited together, both penetrated into the graphite structure. The degree of penetration of the pyrolytic graphite at high temperature differs for various metals. It was also demonstrated that electrodeposited noble metals remain in sub-surface domains of the graphite for hundreds of atomization cycles, which means that they can be used as permanent modifiers.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2001 |
| Autor(en): | Bulska, Ewa ; Thybusch, Brunhilde ; Ortner, Hugo M. |
| Art des Eintrags: | Bibliographie |
| Titel: | Surface and subsurface examination of graphite tubes after electrodeposition of noble metals for electrothermal atomic absorption spectrometry |
| Sprache: | Englisch |
| Publikationsjahr: | 30 April 2001 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Spectrochimica Acta Part B: Atomic Spectroscopy |
| Jahrgang/Volume einer Zeitschrift: | 56 |
| (Heft-)Nummer: | 4 |
| URL / URN: | http://www.sciencedirect.com/science/article/B6THN-42XB6GV-4... |
| Kurzbeschreibung (Abstract): | The modification phenomena of noble metals (Pd, Ir, Rh) electrodeposited onto the inner surface of pyrolytic graphite (PG) coated furnaces were investigated mainly by electron microprobe analysis with energy dispersive X-ray emission detection. The conditions of electrodeposition were optimized in order to achieve the best analytical performance of atomic absorption measurements. Investigations concerning the distribution of noble metals on the tube surface and in-depth were performed at different stages of the tube history. It was found that the noble metals used for the modification do not form a compact layer on the surface but penetrate into the pyrolytic graphite structure already at the deposition step. When two metals were deposited together, both penetrated into the graphite structure. The degree of penetration of the pyrolytic graphite at high temperature differs for various metals. It was also demonstrated that electrodeposited noble metals remain in sub-surface domains of the graphite for hundreds of atomization cycles, which means that they can be used as permanent modifiers. |
| Freie Schlagworte: | Noble metals modifier, Intercalation compounds, GF AAS, Electron probe microanalysis |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 03 Feb 2010 13:43 |
| Letzte Änderung: | 05 Mär 2013 09:30 |
| PPN: | |
| Sponsoren: | This research was carried out in the framework of the project KBN 7 T09 A 053 from Committee for Scientific Research, Poland., E. Bulska thanks the DAAD of Germany for the grant of the research fellowship allowing the EPMA investigation in Darmstadt. |
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