Cyclic voltammetry background subtraction

Fig. 14.34. Voltammetry of epinephrine. Background (A, solid line) and signal containing (A, dashed line) currents generated during fast-scan cyclic voltammetry (300 V/s) at a carbon fiber microelectrode r = 5 pm). A background subtracted cyclic voltammogram (B) is produced from the traces shown in A. (Reprinted from Wightman, et al. Chemical Communication, Interface, 5(3) 22, Fig. 2,1996. Reproduced by permission of the Electrochemical Society, Inc.)...

Fig. 16.6. Examples of BIA voltammetry, illustrated for the oxidation of 2 mM K4Fe(CN)6 in 0.4 M K2S04 electrolyte at a Pt electrode, dispension flow rate 24.5 p.Ls , cell parameters as in Fig. 16.5. (a) Consecutive injections of 16 p.L during a linear potential sweep, scan rate 10 mVs l (b) Background-subtracted cyclic voltammogram recorded during injection, scan rate 2 Vs-1 (c) Background-subtracted square wave (SW) voltammogram recorded during injection SW amplitude 50 mV, SW increment 2 mV, frequency 100 Hz.

The performances of PtSn/C electrocatalysts for ethanol eletro-oxidation are shown in Fig. 3. The anodic cyclic voltammetry responses were plotted after subtracting the backgrounds currents [12,13] and the currents values were normalized per gram of platinum, considering that ethanol adsorption and dehydrogenation occur only on platinum sites at room... 

Figure 4. On line ohmic drop compensated cyclic voltammetry of 2,5-di-(p-anisole)pyrylium perchlorate (3), 5 mM, in acetonitrile, 0.6 M NBU4BF4, at a 5 /xm radius gold disk ultramicroelectrode and a scan rate of 153 kV.s 20 C. (a) in the absence or (b) in the presence of 1. (c) Background subtracted voltammogram (b - a).

Figure 6 Background-subtracted cyclic voltammetry of metmyoglobin (A) 86 J,M met-myoglobin, pH 7.0 (B) 67 mM metmyoglobin, pH 7.0, with excess cyanide to give [Mb(III)Hp] [CN-] of 1 300. Scan rates 20, 50, 100, 200 mV/s.

The primary electrochemical technique employed in these investigations is background-subtracted fast-scan cyclic voltammetry. For DA, the waveform is... 

Zachek MK, Hermans A, l ghtman RM, McCarty GS. Electrochemical dopamine detection comparing gold and carbon fiber microelectrodes using background subtracted fast scan cyclic voltammetry. J Electroanal Chem 2008 614 113—20. 

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