Solid-phase microextraction for the determination of iodinated trihalomethanes in drinking water.
A headspace solid-phase microextraction (HS-SPME) method has been developed for the determination of iodinated trihalomethanes (ITHMs) in treated water samples. Mixed THMs (bromochloroido-, bromodiiodo-, chlorodiiodo-, dibromoiodo- and dichloroiodo-) were previously synthesized since commercial standards are not available. HS-SPME has shorter equilibration times than direct SPME, a cleaner background and a longer fiber life. Experimental parameters such as the selection of SPME coatings, sample volume, extraction time and addition of salts were studied. The Carbowax-divinylbenzene fiber appears to be the most suitable for the determination of ITHMs. Analytical parameters such as linearity, limit of detection and precision were also evaluated. HS-SPME was compared to liquid-liquid microextraction for the analyses of spiked treated water samples, obtaining a good agreement. It is concluded that HS-SPME has a great potential for drinking water analysis.
Cancho
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AGBAR, Societat General d'Aigües de Barcelona S.A., Spain.
Ventura
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Galceran
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MT
D000327:Adsorption; D005617:Chlorofluorocarbons, Methane / Q000032:analysis*; D002849:Chromatography, Gas; D004203:Disinfection; D017613:Iodine Compounds / Q000032:analysis*; D009812:Odorants; D012680:Sensitivity and Specificity; D013649:Taste; D014867:Water / Q000032:analysis*
D005617:Chlorofluorocarbons, Methane; D017613:Iodine Compounds; D014867:Water