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

• Verfasst von: Eiden, Ralf [VerfasserIn]
• Verfasst von: Schöler, Heinz Friedrich [VerfasserIn]
• Verfasst von: Gastner, Manfred [VerfasserIn]
• Titel: 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
• Verf.angabe: Ralf Eiden, Heinz Friedrich Schöler, Manfred Gastner
• E-Jahr: 1998
• Jahr: 25 June 1998
• Umfang: 7 S.
• Fussnoten: Gesehen am 17.11.2022
• Titel Quelle: Enthalten in: Journal of chromatography / A
• Ort Quelle: New York, NY [u.a.] : Science Direct, 1958
• Jahr Quelle: 1998
• Band/Heft Quelle: 809(1998), 1, Seite 151-157
• ISSN Quelle: 1873-3778
• DOI: doi:10.1016/S0021-9673(98)00164-2
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Organotin compounds
• K10plus-PPN: 1822845807

Abstract

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.