TU Darmstadt / ULB / TUbiblio

Secondary ion mass spectrometry for characterizing antimony, arsenic and selenium on graphite surfaces modified with noble metals and used for hydride generation atomic absorption spectrometry

Bulska, E. and Jedral, W. and Kopysc, E. and Ortner, Hugo M. and Flege, Stefan (2002):
Secondary ion mass spectrometry for characterizing antimony, arsenic and selenium on graphite surfaces modified with noble metals and used for hydride generation atomic absorption spectrometry.
57, In: Spectrochimica acta : Part B, (12), Elsevier, pp. 2017-2029, [Article]

Abstract

The surface and sub-surface distribution of noble metals (after electrodeposition of 600 μg or thermal reduction of 10 μg as modifiers), as well as Sb, As and Se (200 ng) as analytes after their deposition on the graphite surface was investigated using secondary ion mass spectrometry (SIMS) in the dynamic mode. This permitted simultaneous observation of the depth profile distribution of modifier and analyte with a depth resolution of down to approximately 25 nm, limited however, by the surface roughness of the samples. Hydride generation was intentionally used for this purpose because in this approach the investigated system: graphite–modifier with added analyte is free from matrix components. This was essential for the evaluation of this novel approach using SIMS for surface analysis. Investigations concerning the distribution of analytes were performed on the graphite surface modified with palladium, iridium or rhodium. It was found that after deposition at 400 °C, all analytes partially penetrated the graphite surface and their distribution overlaps the distribution pattern of the noble metals. The degree of penetration differs for each analyte and depends on the modifier used.

Item Type: Article
Erschienen: 2002
Creators: Bulska, E. and Jedral, W. and Kopysc, E. and Ortner, Hugo M. and Flege, Stefan
Title: Secondary ion mass spectrometry for characterizing antimony, arsenic and selenium on graphite surfaces modified with noble metals and used for hydride generation atomic absorption spectrometry
Language: English
Abstract:

The surface and sub-surface distribution of noble metals (after electrodeposition of 600 μg or thermal reduction of 10 μg as modifiers), as well as Sb, As and Se (200 ng) as analytes after their deposition on the graphite surface was investigated using secondary ion mass spectrometry (SIMS) in the dynamic mode. This permitted simultaneous observation of the depth profile distribution of modifier and analyte with a depth resolution of down to approximately 25 nm, limited however, by the surface roughness of the samples. Hydride generation was intentionally used for this purpose because in this approach the investigated system: graphite–modifier with added analyte is free from matrix components. This was essential for the evaluation of this novel approach using SIMS for surface analysis. Investigations concerning the distribution of analytes were performed on the graphite surface modified with palladium, iridium or rhodium. It was found that after deposition at 400 °C, all analytes partially penetrated the graphite surface and their distribution overlaps the distribution pattern of the noble metals. The degree of penetration differs for each analyte and depends on the modifier used.

Journal or Publication Title: Spectrochimica acta : Part B
Volume: 57
Number: 12
Publisher: Elsevier
Uncontrolled Keywords: Modifier and analyte spatial distribution, Depth profiles, Hydride generation and trapping of Sb, As and Se, Graphite platform, Secondary ion mass spectrometry
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
Date Deposited: 19 Nov 2008 16:29
Funders: This research was carried out in the framework of the KBN 7 T09A 05320 grant from the Committee for Scientific Research, Poland.
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)

View Item View Item