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Redistribution reactions of butyl- and phenyltin species during storage in methanol
Umeå University, Faculty of Science and Technology, Chemistry.
Umeå University, Faculty of Science and Technology, Chemistry.
Umeå University, Faculty of Science and Technology, Chemistry.
2005 (English)In: Journal of Analytical Atomic Spectrometry, Vol. 20, 266-72 p.Article in journal (Refereed) Published
Abstract [en]

The stability of organotin species, which are frequently used as standards, in methanol has been investigated by gas chromatography coupled to either quartz furnace atomic absorption spectrometry, inductively coupled plasma mass spectrometry or mass spectrometry. Ethylation with sodium tetraethylborate was used during sample preparation. The species composition of single or mixed standard solutions at a concentration of 10 µg g–1 was investigated after storing at –20 °C, +4 °C and +22 °C for various time periods. All butyltin species (monobutyltin—MBT, dibutyltin—DBT and tributyltin—TBT) were found to be stable for all storage conditions, even when mixed. The single triphenyltin (TPhT) standard was also stable, whereas mono-and diphenyltin (MPhT; DPhT) were unstable. MPhT redistributed to DPhT and inorganic tin (IOT), while DPhT redistributed to MPhT and to a minor extent to TPhT. In a mixture containing MBT, DBT, TBT, MPhT, DPhT and TPhT, besides the above mentioned reactions, DPhT was found to react strongly with MBT forming up to 73% monobutyl-monophenyltin (MBMPhT) and MPhT. The composition of MBMPhT was investigated by GC-MS. Suggestions for the type of reactions leading to the redistribution of OT species are outlined and suggestions on how to prepare stable OT standards are made.

Place, publisher, year, edition, pages
2005. Vol. 20, 266-72 p.
Keyword [en]
URN: urn:nbn:se:umu:diva-12908DOI: doi:10.1039/b416570eOAI: diva2:152579
Available from: 2007-05-22 Created: 2007-05-22 Last updated: 2011-01-12Bibliographically 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.
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
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)
Available from: 2006-10-11 Created: 2006-10-11 Last updated: 2011-04-06Bibliographically approved

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