Polarographie de l'ion chlorite

Ion-Specific Strength of Attractive Particle Networks

“…Most importantly structure maker surfaces preferentially adsorb structure maker ions and structure breaker surfaces preferentially adsorb structure breaker ions. This theory is an extension of the idea developed by Gurney 27 and Gierst , that ions which have the same influence on water tend to entropically associate, while ions with opposite influence on water associate to a lesser degree. Berube and De Bruyn extended this ion−ion association concept to include the association of ions with a surface.…”

“…These same (or reverse) sequences observed in solutions of ions in water are also observed for the adsorption of ions at interfaces. Early studies of the adsorption of ions at the mercury/water interface indicated that the strength of adsorption followed the Hofmeister sequence for cations Cs + > K + > Na + > Li + and for anions ClO 4 - > I - > Br - > NO 3 - > Cl - > BrO 3 - > IO 3 - . , The opposite sequence (anti-Hofmeister sequence) was observed when pyridine was first adsorbed at the mercury/water interface. , The Hofmeister sequence is generally observed for adsorption of ions on silica, ,, while the anti-Hofmeister sequence is generally observed in the case of alumina. , The Hofmeister sequence is observed for ion adsorption on hydrophobic surfaces such as poly(vinyl acetate) …”

The Enhancement of Electroanalytical Data by On-Line Fast Fourier Transform Data Processing in Electrochemistry

“…In the context of ERM, the so-called reversible or diffusion-controlled (3-5) electrochemical response normally is considered the most desirable for analytical purposes, particularly with highly sensitive relaxation methods, such as differential pulse polarography, second harmonic ac polarography and phase-selective ac polarography. There are exceptions, such as dc polarographic assays based on the highly sensitive catalytic wave (6, 7), but these are rare. The bias toward diffusion-controlled processes is well justified because the response-controlling diffusion rate is relatively insensitive to sample-induced variations in solution or interfacial conditions encountered in typical assay procedures.…”

Fundamental and second harmonic alternating current polarography of electrode processes with coupled first-order catalytic chemical reactions. Theory and experimental results with the iron triethanolamine-chlorite system

“…Sluyters and Sluyters-Rehback (6,7) gave this situation close attention in examining the fundamental harmonic response with the catalytic mechanism. Nernstian conditions in the dc sense require that ks be sufficiently large to validate the expression >> kcu2 (23) Equation 23 leads to the simplifications F(t) = 1 (24) and…”

“…When [CIO-2-] = 0.010M, the kc value obtained was 3.2 X 102 sec-1. Assuming that the rate-determining step in the overall homogeneous process (Reaction R3) involves transfer of the first electron from Fe(TEA)2to C102-, as is usually the case (24), and applying the stoichiometry of Reaction R3, the relationship between kc and the second-order rate constant for the rate-determining step, fc2nd, may be written…”