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Comprehensive trace level determination of organotin compounds in environmental samples using high resolution gas chromatography with flame photometric detection



Comprehensive trace level determination of organotin compounds in environmental samples using high resolution gas chromatography with flame photometric detection



Analytical Chemistry 59(4): 617-623



A comprehensive method for trace analysis of mono-, di-, tri-, and some tetrasubstituted organotin compounds is presented. The ionic compounds are extracted from diluted aqueous solutions as chlorides by using a Tropolon-C18 silica cartridge and from sediment and sewage sludge by using an ethereal tropolon solution. The extracted organotin compounds are ethylated by a Grignard reagent and analyzed by using high-resolution gas chromatography with flame photometric detection (HRGC/FPD). Gas chromatography/mass spectrometry (CG/MS) was used for confirmation. The extraction behavior, gas chromatographic retention, and photometric response of a series of organotin compounds are described, and the identification via electron impact (EI) and chemical ionization (CI) mass spectrometry is discussed. The main organotin compounds detected in various samples are butyltins; cyclohexyl- and phenyltins were identified in some of the sediments and sewage sludge samples. Methylbutyltins and tetrabutyltin were not detected. Concentrations were found to range from low ng/L (parts per trillion) in surface water to low mg/kg (parts per million) in sewage sludge.

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Accession: 005024372

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DOI: 10.1021/ac00131a017


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