In situ ethylation-purge and programmed-temperature-vaporizer cold trapping-gas chromatography-mass spectrometry as an automated technique for the determination of methyl- and butyltin compounds in aqueous samples
A new method for the determination of methyl- and butyltin compounds in aqueous samples is presented. The organotin species are derivatized in situ with sodium tetraethylborate (NaBEt4) in an 800-ml sample, purged on-line with helium and cryofocused at −40°C in the Tenax-filled glass insert of a mod...
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
25 June 1998
|
| In: |
Journal of chromatography
Year: 1998, Jahrgang: 809, Heft: 1, Pages: 151-157 |
| ISSN: | 1873-3778 |
| DOI: | 10.1016/S0021-9673(98)00164-2 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/S0021-9673(98)00164-2 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0021967398001642 
|
| Verfasserangaben: | Ralf Eiden, Heinz Friedrich Schöler, Manfred Gastner |
| Zusammenfassung: | A new method for the determination of methyl- and butyltin compounds in aqueous samples is presented. The organotin species are derivatized in situ with sodium tetraethylborate (NaBEt4) in an 800-ml sample, purged on-line with helium and cryofocused at −40°C in the Tenax-filled glass insert of a modified split/splitless injector. The injector is equipped with a liquid nitrogen cooling and a heating wire which serves for programmed-temperature vaporization. After thermal desorption the peralkylated tin species are refocussed on the capillary GC column at 10°C followed by GC separation and mass spectrometric detection in the full scan mode. All steps are computer-controlled so that once the derivatizing reagent is added, the analysis is performed automatically. The concentration of NaBEt4, the reaction time, the purge flow-rate and the purge time were optimized. The preconcentration of sample volumes of 800 ml led to detection limits in the range of 1-2 ng Sn/l. Due to the compound specific information of the full scan mass spectra, the presented method is a powerful tool for the speciation of alkyltin compounds in aqueous samples. |
|---|---|
| Beschreibung: | Gesehen am 17.11.2022 |
| Beschreibung: | Online Resource |
| ISSN: | 1873-3778 |
| DOI: | 10.1016/S0021-9673(98)00164-2 |