title: Preconcentration and determination of ultratraces of lead and bismuth.
abstract: The recovery and preconcentration of Pb(II) and Bi(III) by coupling ion-exchange and precomplexation with 1,2-dihydroxy-3,5-benzenedisulphonic acid and 3,3',4'-trihydroxyfuchsone-2''-sulphonic acid has been investigated. Metal recoveries at 0.1-mg l . concentrations are better than 99% in the presence of cationic, anionic and non-ionic detergents, or an organic sequestering agent such as NTA, and at high ionic strength. Experiments with radiotracers show total recovery even at 15-ng l . concentrations. In the light of the results the procedure is proposed as a simple and rapid analytical method to preconcentrate Pb(II) and Bi(III).
authors.affiliation: Dipartimento di Chimica Analitica, Università di Torino, Via P. Giuria 5, 10125 Torino, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Sarzanini
authors.forename: E
authors.initials: E
authors.lastname: Mentasti
authors.forename: M C
authors.initials: MC
authors.lastname: Gennaro
authors.forename: V
authors.initials: V
authors.lastname: Porta
authors.forename: P
authors.initials: P
authors.lastname: Volpe