title: Electrodialytic matrix isolation for metal cations.
abstract: Electrodialytic ion transfer was studied as a matrix isolation tool for heavy metal determinations. An ion transfer device (ITD) was used for the transfer of heavy metal cations. Under optimized flow rates applied voltage and receptor composition, heavy metal ions were quantitatively transferred at concentrations spanning µg L(-1) to mg L(-1). As long as the sample pH was acidic, there was no significant sample pH effect on the transfer efficiencies. Significant salt concentrations (>1 mM NaCl), however, decreased the transfer efficiency. This could be ameliorated (up to 5 mM NaCl) by transient instead of continuous sample introduction. The device was applied to the determination of Fe, Cu and Zn in equine and bovine serum; the reproducibility was better than conventional digestion method.
authors.affiliation: Department of Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan. Electronic address: ohira@sci.kumamoto-u.ac.jp.
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Ohira
authors.affiliation: Department of Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan.
authors.forename: Yuri
authors.initials: Y
authors.lastname: Hiroyama
authors.affiliation: Department of Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan.
authors.forename: Koretaka
authors.initials: K
authors.lastname: Nakamura
authors.affiliation: Department of Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan.
authors.forename: Takumi
authors.initials: T
authors.lastname: Koda
authors.affiliation: Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium PL, Arlington, TX 76019-0065, USA.
authors.forename: Purnendu K
authors.initials: PK
authors.lastname: Dasgupta
authors.affiliation: Department of Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan.
authors.forename: Kei
authors.initials: K
authors.lastname: Toda
mesh_terms: D000818:Animals; D002413:Cations, Divalent; D002417:Cattle; D003300:Copper / Q000097:blood*; D003956:Dialysis; D004573:Electrolytes; D006736:Horses; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000097:blood*; D057230:Limit of Detection; D015203:Reproducibility of Results; D012965:Sodium Chloride / Q000737:chemistry; D015032:Zinc / Q000097:blood*
chemical_list: D002413:Cations, Divalent; D004573:Electrolytes; D012965:Sodium Chloride; D003300:Copper; D007501:Iron; D015032:Zinc
keywords: Heavy metals; Ion transfer device; Matrix isolation; Serum