title: Preconcentration of metal ions on porphyrin-modified sorbents as pretreatment step in AAS determination.
abstract: The preconcentration of some divalent metal ions by complexation with carboxyphenylporphyrin (TCPP) and retention on conventional anion-exchange resins and a non-ionic sorbent was examined. Two different procedures--ligand in solution or immobilised on the solid sorbents--were evaluated as a function of pH. The selectivity order for metal ions on the TCPP-loaded resin Amberlite IRA-904 was established as: Pb(II)>Ni(II)>Cu(II)>Cd(II)>Mg(II).
authors.affiliation: Department of Chemistry, University of Warsaw, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Kilian
authors.forename: K
authors.initials: K
authors.lastname: Pyrzyñska