Separation of mono-, di- and tributyltin compounds by isocratic ion-exchange liquid chromatography coupled with hydride-generation atomic absorption spectrometric determination
✍ Scribed by Gerhard Schulze; Christian Lehmann
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 474 KB
- Volume
- 288
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
A method is described for the speciation determination of n-butyltin compounds. The three substances are separated from each other and from inorganic tin ions within 10 min by ion-exchange chromatography using a mixture of citric and oxalic acid in methanol as eluent. They are determined by atomic absorption spectrometry after on-line hydride generation and decomposition of the volatile hydrides in an electrically heated quartz T-tube. The limits of detection were 27, 40 and 31 nmol/l for tributyltin, dibutyltin and monobutyltin, respectively. Linear calibration graphs were obtained between 0.1 and 10 pmol 1-l. The method was applied to spiked samples of sea water after enrichment by solid-phase extraction.