Fundamental features of metal ion determination by stripping chronopotentiometry

A study of the features of stripping chronopotentiometry (SCP) as a functio n of the stripping current magnitude is presented. Transformation of the E versus t traces into dt/dE versus E curves allows the charging current to b e eliminated from the analytical signal (the transition time, tau). Manipul ation of the applied stripping current allows the stripping time regime to be varied from conditions of semi-infinite linear diffusion (I tau (1/2) co nstant; tau proportional to c(2)) to conditions approaching complete deplet ion (I tau constant, tau proportional to c). The sensitivity and resolution of SCP are greatest under conditions of semi-infinite diffusion, and are c omparable with those of the more widely exploited DP-SV technique (C) 2001 Elsevier Science S.A. All rights reserved.