2. Measuring ion or molecule concentration

2.1 Ion indicator electrodes

By analogy with the definition of pH in acidimetry, we define the quantity pX by the relation :

pX = - lg a_{X}

^( 11 )

where a _X...

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Measuring ion or molecule concentration

(1) - HILDEBRAND (J.H.) - Some applications of hydrogen electrode in analysis, research and teaching (Quelques applications de l'électrode à hydrogène en analyse, recherche et enseignement). - J. Am. Chem. Soc., 35(7), p. 847-871 (1913).
(2) - IUPAC - Definition...