title: A novel kinetic method for the speciation of cadmium in river water by micro solvent extraction with dithizone.
abstract: Cadmium species in river water were kinetically extracted with dithizone by varying the extraction time. The obtained extraction curve showed a three-stage stepwise profile that reflected the rate of the ligand substitution reaction between the dithizone and cadmium species. Corresponding to each stage, we divided these extracted cadmium species into three groups: "highly labile", "moderately labile" and "slowly labile" species.
authors.affiliation: Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University, Utsunomiya 321-8585, Japan. shimizut@cc.utsunomiya-u.ac.jp
authors.forename: Tokuo
authors.initials: T
authors.lastname: Shimizu
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Hiraoka
authors.forename: Miyuki
authors.initials: M
authors.lastname: Kikuchi
authors.forename: Nobuo
authors.initials: N
authors.lastname: Uehara
mesh_terms: D002104:Cadmium / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D004230:Dithizone; D006812:Humic Substances; D007700:Kinetics; D008722:Methods; D008956:Models, Chemical; D045483:Rivers / Q000737:chemistry*; D012997:Solvents; D018508:Water Purification / Q000379:methods*
chemical_list: D006812:Humic Substances; D012997:Solvents; D002104:Cadmium; D004230:Dithizone