home *** CD-ROM | disk | FTP | other *** search
- Polar 1.3: simulator of voltammograms
-
- Dr Weiguang HUANG
- School of Chemistry, University of New South Walse, Sydney, NSW 2052, Australia
- Phone: 61-(0)2-385-4643, Fax: 61-(0)2-6622835
- Email: w.huang@unsw.edu.au, s9300078@aix00.csd.unsw.oz.au
-
- The program simulates 16 types of voltammograms with charge current
- and random noise (i.e. DC, normal pulse, pseudo-derivative normal pulse,
- differential pulse, linear sweep, cyclic normal pulse, cyclic pseudo-
- derivative normal pulse, cyclic differential pulse, and cyclic linear sweep
- voltammograms at both planar and spherical electrodes). The shape of normal
- pulse polarogram is equivalent to DC polarogram while the shape of pseudo-
- derivative normal pulse polarogram is similar to differential pulse
- polarogram. But there is effect of the DC term on differential pulse
- voltammogram.
- The user can select polarography (voltammetry) methods (e.g. cyclic
- differential pulse, or cyclic linear sweep voltammetry at planar or
- spherical electrode), and input the number of species and individual
- species' parameters such as the rate constant ks, charge transfer
- coeffiecient alpha, number of electron n, concentration C, diffusion
- coeffiecient D, and standard potential E0. The user also can enter
- the sweep range, potential step Es, potential scan rate v, pulse time tp,
- drop time td, area of electrode A, pulse amplitude, noise and baseline.
- The progrom displays voltammograms. It also outputs the number of peaks,
- the peak current and potential, and I-E data, which can be imported into
- other program (e.g. Lotus 123).
- It has been successfully applied to fit experimental polarograms
- (voltammgrams) of In(III), Cd(II), Pb(II), Tl(I), Cr(III), Zn(II), and
- binuclear copper complex in aqueous and non-aqueous media at mercury,
- solid metal and non-metal electrodes (specifically the dropping mercury,
- hanging mercury drop, gold, platinum and glassy carbon electrodes) by
- various electrochemical techniques (differential pulse, sqware wave, and
- pseudo-derivative normal pulse polargraphies) [1-5].
- It runs on IBM PC under MS-DOS, available from the author.
-
- REFERENCES
- [1] W. Huang, T. Henderson, A.M. Bond and K.B. Oldham, Curve fitting to
- resolve overlapping voltammetric peaks: model and examples, Anal.
- Chim. Acta, 1995, 304, 1-15.
- [2] W. Huang, Resolution in polarography and voltammetry: New theoretical
- and experimental aspects, Ph.D. thesis, Deakin University, Geelong,
- Australia, 1990, p 1-305.
- [3] A. Bond, W. Huang and K. Oldham, Studies of overlapping peaks in pulse
- polarography: resolution on reversible electrode processes, Proc. of
- 7th Australian Electrochem. Conf., Uni. of New South Walses, Sydney,
- Australia, 1988, p 383.
- [4] A. Bond, W. Huang, T. Henderson and K. Oldham, Classification of
- Methods for Resolving Overlapping Signals, Proc. of Chinese Chemistry
- Symposium, La Trobe Uni., Melbourne, Australia, 1990, p 8-9.
- [5] W. Huang, B. Hibbert and A. Bond, Evaluation of resolution of polaro-
- graphic peaks, Proc. of 9th Australian Electrochem. Conf., Uni. of
- Wollongong, Wollongong, Australia, 1994, p 75.1-75.3.
- [6] W. Huang and B. Hibbert, Computers & Chem., 1995.
-