Electrode Polarization and Conductivity

  • #1
The common mantra is that when measuring conductivity in solutions the electrodes will build up a polarization layer and disturb the measurement, thus a 4 electrode measurement is used and an alternating current impressed up on the outer electrodes, usually around 1000 hz.

I have been trying to learn more about the dynamics of these layers but my search of the journals and my somewhat limited chemistry library reveal nothing on this issue other than a brief mention. I would expect the theory of Kolrausch et. al. for ion mobility would play into this but I cannot find either theoretical information on the evolution of the layer with time, nor any experimental data.

Does anyone here know of a journal or textbook resource that deliberates on this, especially mathematically?

Thanks
Fritz
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Answers and Replies

  • #3
The tomes of electrochemistry never seem to state this explicitly, but it makes sense that these develop as double layers--Helmholtz, Stern etc.
thanks
Fritz
 

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