title: Concentration of chlorophenols in water with sodium dodecylsulfate-gamma-alumina admicelles for high-performance liquid chromatographic analysis.
abstract: Chlorophenols in water were sorbed onto sodium dodecylsulfate (SDS)-alumina (gamma-form) admicelles. The extent of sorption increased with increasing amount of SDS and decreasing solution pH. Conditions for good recovery were obtained when 100 mg SDS and 1.5 g alumina was used at pH 2. However, the yield decreased with a further increase in the SDS concentration due to the formation of normal SDS micelles. The extent of sorption also increased with increasing hydrophobicity of the chlorophenol, indicating that hydrophobic interactions predominate for the collection of analytes. When a cartridge column filled with admicelles was used, >90% of tetrachlorophenol and pentachlorophenol in 200 ml of water samples were rapidly recovered. The sorbed analytes were eluted with 1 ml acetonitrile. The accuracy and precision of the present method were demonstrated for the HPLC analysis with ultraviolet (290 nm) detection of microg l(-1) levels of tetrachlorophenol and pentachlorophenol in river water samples.
authors.affiliation: Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa, Japan. saitoh@numse.nagoya-u.ac.jp
authors.forename: Tohru
authors.initials: T
authors.lastname: Saitoh
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Nakayama
authors.forename: Masataka
authors.initials: M
authors.lastname: Hiraide
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D002733:Chlorophenols / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D008823:Micelles; D015203:Reproducibility of Results; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D002733:Chlorophenols; D008823:Micelles; D014874:Water Pollutants, Chemical; D012967:Sodium Dodecyl Sulfate; D000537:Aluminum Oxide