| Themes > Science > Chemistry > Electrochemistry > Introduction to Electrochemical Techniques > Electrochemical Measurements > Linear perturbed measurements |
This group includes all techniques that are designed and analyzed on the assumption that the electrochemical system can be treated as a combination of linear circuit elements (e.g. resistors, capacitors etc.). This is almost invariably an approximation to reality, but by restricting ourselves to small changes of potential (of the order of 10 mV or less), we generally obtain a reasonable approximation to linear behaviour. It can be shown that all linear techniques sample the same basic characteristics of the electrochemical system, although some methods provide a more thorough sampling than others. Examples of linear techniques include linear polarization resistance measurement, electrochemical impedance spectroscopy and some small amplitude transient techniques. |
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