Hur fungerar en glaselektrod?

Sammanfattning: To understand the glass electrode needs knowledge from more than one level. The construction ofthe glass electrode is one part, an other is the composition and structure of glass. The Nernstequation have an important role, but also the sources of errors in the analysis and the calibration ofthe glass electrode. Focus for this article is how the glass electrode really works and how Gibbs freeenergy made the potential dependent of the concentration of H+and gives the logarithm to thefunction. Nikolskii's ion exchange theory starts to explain the question about how the potentialcreates and Baucke's dissociation mechanism made it more explicit. The big different in theequations from the both theories respectively is the meaning of the constants, but for practical useof the glass electrode in analysis it is not important when the value of the constant is given bycalibration. This is not an excuse for that fact that the dissociation mechanism is more completethan the ion exchange theory in the understanding of the glass electrode.