Sweep voltametry

Investigations of Redox Reactions by Linear Sweep Voltametry... 

LSCSV linear sweep cathodic strip voltametry... 

The influence of Qiis significant in rapid voltametry measurement. The equivalent circuit in Fig. 2 can be regarded as a simple RC circuit with a time constant, t = Qii s, especially when no redox material exists R = oo). In other words, the ctirrent signal response flattens due to the limitation imposed by the time constant dtiring a fast sweep. However, for the microelectrode, z = pa where p is the specific resistance of the solution and a is the radius of the electrode. Hence, unlike with the use of an ordinary electrode, fast sweep is possible. 

When p is small (slow sweep, small radius of the electrode), Ip is the same as in Eq. (3). Therefore, by performing cyclic voltametry at various sweeping rates and obtaining the steady-state current, which is expressed by Eq. (3) for a sufficiently slow sweeping rate, and the peak current, which is expressed by Eqs. (4) and (5) for a fast sweeping rate, it is relatively easy to determine the concentration and diffusion coefficient of the solute in a gel. 

Rather, they show a specific peak in the middle. The time to exhibit this peak is shorter in the O electrode, and longer in the I electrode. Figure 11 shows the results of the individually determined D and C from the peak current value by fast sweep rate cyclic voltametry as a function of time, changing the solvent from water to 70% acetone solution and using the same gel-treated electrode. The current peak corresponds to the maximum of the diffusion coefficient of Fc and the time needed for this maximum to appear is less in the 0 electrode and more in the I electrode. Although it is not yet clear as to why the maximum appears in the diffusion coefficient, it is hypothesized that it relates to the exchange process of the solvent from... 

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