Rapid determination of butyltin species in water samples by multicapillary gas chromatography with atomic emission detection following headspace solid-phase microextraction.
A procedure for the rapid determination of mono-, di- and tributyltin in water samples is described. The analytes are simultaneously ethylated and concentrated on a solid-phase microextraction fibre placed in the headspace over the sample for 2 min. The ethylated species are then separated and selectively quantified in only 90 s using a multicapillary gas chromatography column combined with atomic emission detection. The influence of blank signals and sampling conditions on the sensitivity of the method is described. Detection limits of 1-5 ng/l and relative standard deviations of 6-10% at concentrations of 20 ng/l were obtained.
Departamento de Química Analítica, Nurrición y Bromatología, Universidad de Santiago de Compostela, Spain.
J Carpinterio
JC
Botana
I Rodríguez
IR
Pereiro
R Cela
RC
Torrijos
D002849:Chromatography, Gas / Q000379:methods*; D009947:Organotin Compounds / Q000032:analysis*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014874:Water Pollutants, Chemical / Q000032:analysis*
D009947:Organotin Compounds; D014874:Water Pollutants, Chemical