title: Simple determination of trace amounts of anionic surfactants in river water by spectrophotometry combined with solid-phase extraction.
abstract: A simple and sensitive spectrophotometric method combined with solid-phase extraction (SPE) for the simultaneous determination of sodium linear-dodecylbenzenesulfonate (DBS) and sodium dodecyl sulfate (SDS) is described. The C2 (ethyl group bonded silicagel) cartridge could be repeatedly used more than 500 times for SPE, and it enabled the anionic surfactants to be concentrated by 50-fold. The calibration graph for DBS was linear in the range from 1.6 x 10(-8) M to 5.0 x 10(-7) M and for SDS from 2.0 x 10(-9) M to 3.0 x 10(-7) M. The relative standard deviation (n=5) for 5.0 x 10(-7) M DBS was 3.1% and for 2.5 x 10(-7) M SDS was 1.7%. The proposed method was applied to the simultaneous determination of DBS and SDS in river-water samples.
authors.affiliation: Department of Bioresources Chemistry, Faculty of Agriculture, Okayama University, Tsushima-naka, Japan.
authors.forename: Masakazu
authors.initials: M
authors.lastname: Tsukamoto
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Murata
authors.forename: Mikiro
authors.initials: M
authors.lastname: Tada
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Shimoishi
mesh_terms: D000838:Anions / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D001557:Benzenesulfonates / Q000032:analysis / Q000737:chemistry; D045483:Rivers / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods*; D013501:Surface-Active Agents / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D000838:Anions; D001557:Benzenesulfonates; D013501:Surface-Active Agents; C001114:dodecylbenzenesulfonic acid