title: Speciation of butyltin derivatives in surface sediments of three southern Brazilian harbors.
abstract: For the first time, organotin compounds were determined in surface sediment samples collected from São Francisco do Sul, Itajaí-Navegantes and Imbituba Harbors, located in Santa Catarina State, Brazil. Butyltins (BTs) were determined by gas chromatography with a pulsed flame photometric detector (GC-PFPD) after being modified using the Grignard derivatization method. The concentrations of BTs derivatives ranged from n.d. to 1136.6 ng (Sn) g(-1) of dry weight (dw) sediment for tributyltin (TBT), n.d. to 394.4 ng (Sn)g(-1) dw for dibutyltin (DBT) and n.d. to 312.2 ng (Sn) g(-1) dw for monobutyltin (MBT). The highest concentration of total BTs was found at the Itajaí-Açu River dockyard, indicating intense inputs of antifouling paints to the environment. The relative difference in the BTs levels is a particular characteristic of sediments from harbors and may be related to the shipyards and the boat traffic which still use TBT-based antifouling paints.
authors.affiliation: Chemistry Department, UFSC, Florianópolis, Santa Catarina, Brazil. rossi.cristiane@yahoo.com.br
authors.forename: Cristiane Rossi
authors.initials: CR
authors.lastname: de Oliveira
authors.forename: DayanaMoscardi
authors.initials: D
authors.lastname: dos Santos
authors.forename: Luiz Augusto dos Santos
authors.initials: LA
authors.lastname: Madureira
authors.forename: Mary Rosa Rodrigues
authors.initials: MR
authors.lastname: de Marchi
mesh_terms: D001938:Brazil; D002849:Chromatography, Gas; D004784:Environmental Monitoring / Q000379:methods; D019015:Geologic Sediments / Q000032:analysis*; D009947:Organotin Compounds / Q000032:analysis*; D010783:Photometry; D045483:Rivers / Q000737:chemistry*; D014220:Trialkyltin Compounds; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D009947:Organotin Compounds; D014220:Trialkyltin Compounds; D014874:Water Pollutants, Chemical; C516409:mono-n-butyltin; C056189:di-n-butyltin; C011559:tributyltin