We propose to modify the elementary Cauchy peak with a variable coefficient in the mathematical description of the analytical signals of Tl(I), Cd(II), Sn(IV), Pb(II), Sb(III), and Bi(III) in stripping voltammetry (SVA). It is shown that the approximation equation previously proposed for the variable coefficient  describes all 12 branches of SVA peaks of the metals under study with five different empirical coefficients. We found the dependence of these five coefficients in the versatile approximation equation and the geometrical parameter derived from the graph of the variable coefficient on five levels of normalization. We also found the dependence of the five coefficients and the geometrical parameter of positive branches on the corresponding coefficients and the geometrical parameter of negative branches of SVA peaks. It is likely that the proposed approximation equation is rather versatile and can describe the majority of analytical peaks in different methods of analytical chemistry.
|Number of pages||8|
|Journal||Journal of Analytical Chemistry|
|Publication status||Published - Mar 2004|
ASJC Scopus subject areas
- Analytical Chemistry