title: Rotating disk sorptive extraction of triclosan and methyl-triclosan from water samples.
abstract: A method of sample preparation based on use of rotating disk sorptive extraction (RDSE) has been developed for determination of triclosan (TCS) and methyl-triclosan (MTCS) in water samples. The sorptive and desorptive behavior of the analytes was studied by use of a rotating disk coated with polydimethylsiloxane (PDMS) on one of its surfaces. Chemical and extraction behavior were studied to establish the best conditions for extraction. The optimum conditions for both analytes were: sample volume 25 mL, pH 4.5, NaCl concentration 6% (w/v), disk rotational velocity 1,250 rpm, and extraction time 80 min. A desorption time of 30 min was used with 5 mL methanol. The detection limits for TCS and MTCS were 46 and 34 ng L(-1), respectively. Recovery was evaluated at two concentrations, 160 and 800 ng L(-1), and the values obtained were between 80 and 100%. The method was applied to analysis of influent water at two treatment plants in Santiago, Chile.
authors: Departamento de Química Inorgánica y Analítica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 653, Santiago, Chile.
authors: Lourdes
authors: L
authors: Jachero
authors: Betsabet
authors: B
authors: Sepúlveda
authors: Inés
authors: I
authors: Ahumada
authors: Edwar
authors: E
authors: Fuentes
authors: Pablo
authors: P
authors: Richter
mesh_terms: D000891:Anti-Infective Agents, Local / Q000737:chemistry*; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D005618:Fresh Water / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D015203:Reproducibility of Results; D014260:Triclosan / Q000031:analogs & derivatives* / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000891:Anti-Infective Agents, Local; D014874:Water Pollutants, Chemical; D014260:Triclosan; C502486:methyl triclosan