Speciation of butyltin derivatives in surface sediments of three southern Brazilian harbors.
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.
de Oliveira
Cristiane Rossi
CR
Chemistry Department, UFSC, Florianópolis, Santa Catarina, Brazil. rossi.cristiane@yahoo.com.br
dos Santos
DayanaMoscardi
D
Madureira
Luiz Augusto dos Santos
LA
de Marchi
Mary Rosa Rodrigues
MR
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
D009947:Organotin Compounds; D014220:Trialkyltin Compounds; D014874:Water Pollutants, Chemical; C516409:mono-n-butyltin; C056189:di-n-butyltin; C011559:tributyltin