Preceding chemical reactions in dc polarography:

Rigorous analytical solution for a preceding chemical reaction in Normal Pulse Voltammetry at spherical electrodes and microelectrodes

“…There are many interesting examples which support the importance of the study of electrochemical processes preceded by a homogeneous chemical reaction: metal complexation [1][2][3], catalytic processes, dehydration of carbonyl compounds [4,5], availability of substances (toxins, nutrients, etc. ), deprotonation of acids [6], tautomeric equilibria [7], etc.…”

Bismuth-coated screen-printed electrodes for the simple voltammetric determination of formaldehyde

“…The obtained range of optimum pH virtually coincides with the range of pH at which the wave limiting current or the reduction peak of FAH obtained at the dropping mercury electrode in the absence of oxygen attains a maximum. 48 As can be seen from Fig. 5B, with an increase in the pH of the solution, the maximum of the FM reduction peak shifts towards negative potential values.…”

“…An excess of hydrazine sulfate shifts the equilibrium to the formation of electrochemically active hydrazone, which increases the yield of the reaction product. 48 The concentration of HRZ from 0.09 M to 0.15 M is sufficient to convert the main part of FM into FAH.…”

New Approximate Analytical Expressions for Transient Concentration Profiles and Current Pertaining to a Homogeneous Chemical Reaction at Hemispherical Microelectrodes

“…These advantages include enhanced current density, reduced ohmic drop, small double-layer capacitance, rapid analysis time, and small cell time constants. Homogeneous chemical reactions occurring at microelectrodes include metal complexation, − catalytic processes, dehydration of carbonyl compounds, , deprotonation of acids, and tautomeric equilibria . In particular, the common case of homogeneous reactions involving electrogenerated species has been extensively studied using different electrochemical techniques such as cyclic voltammetry, chronoamperometry, , square-wave voltammetry, − chronocoulometry, and chronopotentiometry …”