ELECTROCHEMICAL DETERMINATION OF LEAD AND LEAD ION TRANSFER AT LIQUID LIQUID INTERFACES

The transfer behavior of lead (II) ion at a liquid-liquid interface, facilitated by neutral carriers (polyethylene glycols), is studied by an electrochemical method. The transfer process is discussed in terms of the formation of complexes in two phases and attributed to the transfer of a complex ion across the interface. The apparent standard transfer potential, Δw oφPbL o, apparent standard Gibbs energy of transfer, Δw oGPbL o, and the dissociation constant of the complex, KPbL, in the aqueous phase are obtained from the experimental data. The results suggest a new electrochemical method for the determination of lead. © 1990.