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A comparison between continuum- and line source AAS for speciation analysis of butyl- and phenyltin compounds
Umeå University, Faculty of Science and Technology, Department of Chemistry.
Umeå University, Faculty of Science and Technology, Department of Chemistry.
2006 (English)In: Journal of Analytical Atomic Spectrometry, ISSN 0267-9477, E-ISSN 1364-5544, Vol. 21, no 7, 708-711 p.Article in journal (Refereed) Published
Abstract [en]

The analytical potential of using instrumentation based on AAS for speciation analysis was investigated. Organic tin (OT) species were determined following gas chromatographic (GC) separation, atomization in a quartz tube (QT) and detection by line source AAS (LSAAS) and, for comparison, by state of the art continuum source AAS (CSAAS). For an unbiased comparison of the AAS instruments, their working conditions were individually optimized. For CSAAS, the linear range was limited by the GC column capacity (10-1600 ng g-1) and for LSAAS this range was limited by stray radiation (20-1000 ng g-1). With background correction, the instrumental LODs for OT were 6-22 pg as tin for CSAAS, while for LSAAS corresponding values were five to ten times poorer. Without background correction, the LOD of CSAAS was twice as good as that of LSAAS. For method validation, two certified reference materials, Harbour Sediment BCR-646 and Oyster Tissue BCR-710, were analysed.

Place, publisher, year, edition, pages
London: Royal Society of Chemistry , 2006. Vol. 21, no 7, 708-711 p.
Identifiers
URN: urn:nbn:se:umu:diva-18982DOI: 10.1039/b518270kOAI: oai:DiVA.org:umu-18982DiVA: diva2:201078
Available from: 2009-03-03 Created: 2009-03-03 Last updated: 2017-12-13Bibliographically approved
In thesis
1. Speciation analysis of butyl- and phenyltin compounds in environmental samples by GC separation and atomic spectrometric detection
Open this publication in new window or tab >>Speciation analysis of butyl- and phenyltin compounds in environmental samples by GC separation and atomic spectrometric detection
2006 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The main goal of the work presented in this thesis is to improve the reliability of existing methods for speciation analysis of organotin compounds

Species-specific isotope dilution (SSID) calibration in combination with gas chromatography – inductively coupled plasma mass spectrometry was used to investigate the transformation of phenyltin species during sample preparation. Isotope-enriched phenyltin species were synthesized from corresponding isotope-enriched tin metals. SSID with a mixture of phenyltin species (PhTs) from one isotope was used to evaluate different extraction procedures for the determination of PhTs in fresh water sediment. Preparative liquid chromatography was used to produce single isotope-enriched phenyltin species making a multi-isotope spike (MI) SSID calibration possible. Different extraction procedures for the analysis of phenyltin species in biological samples were evaluated by applying MI-SSID. Degradation of TPhT and DPhT during sample extraction was observed and quantified. Accurate results were therefore obtained. A sample preparation procedure using mild extraction conditions with reasonable recoveries is described.

The stability of organotin standards was investigated under different storage conditions. Mono- and diphenyltin were found to be redistributed and degraded during storage in methanol but were stabilized in sodium acetate/ acetic acid. A fast redistribution between monobutyl- and diphenyl tin has been observed and therefore it is therefore recommended that standards be derivatized as soon as possible after butyl- and phenyltin standards are mixed.

Included in the thesis is also an investigation of the analytical potential of using instrumentation based on atomic absorption spectrometry (AAS) for speciation analysis of organotin compounds. The method was based on gas chromatographic separation, atomization in a quartz tube and detection by line source (LS) AAS and for comparison, by state of the art continuum source (CS) AAS. Analytical performances of CSAAS system were found to be better compared to LSAAS.

Place, publisher, year, edition, pages
Umeå: Kemi, 2006. 35 p.
Keyword
Organotin speciation analysis, species-specific isotope dilution, inductively coupled plasma mass spectrometry, single isotope spike, multi-isotope spike, redistribution, species transformation, preparative liquid chromatography, gas chromatography, line source atomic absorption spectrometry, continuum source atomic absorption spectrometry
National Category
Analytical Chemistry
Identifiers
urn:nbn:se:umu:diva-892 (URN)91-7264-187-8 (ISBN)
Public defence
2006-11-03, KBC3A9, KBC, Department of Chemistry, Analytical Chemistry, 90187 Umeå, 10:00 (English)
Opponent
Supervisors
Available from: 2006-10-11 Created: 2006-10-11 Last updated: 2011-04-06Bibliographically approved

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