title: A study of the partitioning behavior of Irgarol-1051 and its transformation products.
abstract: Partitioning behavior of the antifouling booster biocide, Irgarol-1051 (2-methythio-4-tert-butylamino-6-cyclopropylamino-s-triazine), its production by-product, M3, and its environmental transformation products, M1 and M2, were studied. Octanol-water partition coefficients, log K(OW), and organic matter-water partition coefficients, log K(OC), of these s-triazines were measured by reversed-phase HPLC and a triphasic SPME equilibrium model, respectively. The average log K(OW) (+/-SD) of the four s-triazine species were: 4.39+/-0.07 (M3); 3.38+/-0.12 (Irgarol-1051); 2.92+/-0.12 (M2) and 2.54+/-0.11 (M1), while mean log K(OC) (+/-SD) of these species were: 2.47+/-0.03 (M3); 2.16+/-0.03 (Irgarol-1051); 1.97+/-0.03 (M2) and 1.79+/-0.04 (M1). These results were compared to reported physicochemical parameters of Irgarol-1051 in the literature. Partitioning behavior of these s-triazine species in the coastal environment revealed by their K(OW) and K(OC) were also discussed.
authors.affiliation: Centre for Coastal Pollution and Conservation, Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
authors.forename: Ka-Ho
authors.initials: KH
authors.lastname: Lam
authors.forename: Ho-Yin
authors.initials: HY
authors.lastname: Wai
authors.forename: Kenneth M Y
authors.initials: KM
authors.lastname: Leung
authors.forename: Vic W H
authors.initials: VW
authors.lastname: Tsang
authors.forename: Chi-Fung
authors.initials: CF
authors.lastname: Tang
authors.forename: Richard Y H
authors.initials: RY
authors.lastname: Cheung
authors.forename: Michael H W
authors.initials: MH
authors.lastname: Lam
mesh_terms: D020003:1-Octanol / Q000737:chemistry; D002686:Chitin / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D057927:Hydrophobic and Hydrophilic Interactions; D008956:Models, Chemical; D010575:Pesticides / Q000737:chemistry*; D014227:Triazines / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical
chemical_list: D010575:Pesticides; D014227:Triazines; D014874:Water Pollutants, Chemical; D014867:Water; D002686:Chitin; D020003:1-Octanol