The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH = log 1/2[1/(H+)], where (H+) is the hydrogen ion concentration in gram equivalents per liter of solution. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

Descriptor ID	D006863
MeSH Number(s)	G02.300
Concept/Terms	Hydrogen-Ion Concentration Hydrogen-Ion Concentration Concentration, Hydrogen-Ion Concentrations, Hydrogen-Ion Hydrogen Ion Concentration Hydrogen-Ion Concentrations pH pH

Below are MeSH descriptors whose meaning is more general than "Hydrogen-Ion Concentration".

Below are MeSH descriptors whose meaning is related to "Hydrogen-Ion Concentration".

Below are MeSH descriptors whose meaning is more specific than "Hydrogen-Ion Concentration".