Originally introduced in 1909 byS. P. L. Sørensen, using the notationpH+ for what he called the “hydrogen ion exponent” (Wasserstoffionenexponent ) of a solution. He may have chosen the symbolp arbitrarily; another suggestion is that it abbreviates GermanPotenz(“power”). The “H” is the international chemical symbol for the elementhydrogen.
pH
- (chemistry) Measure of theacidity (low pH) orbasicity (high pH) of anaqueoussolution, equal to the negative logarithm of the concentration ofhydronium ions inmolars.
2000 October 1, Suda Kiatkamjornwong, Wararuk Chomsaksakul, Manit Sonsuk, “Radiation modification of water absorption of cassava starch by acrylic acid/acrylamide”, inRadiation Physics and Chemistry, volume59, number 4 (in English),→DOI, page423:The water absorbency of the anionically starch-grafted AA/AM absorbent is markedly affected by thepH of the buffer solution at different ionic strengths. The charge of the ionic monomer affects the pH sensitivity of the superabsorbent polymers. An acidic superabsorbent normally ionizes at high pH but unionizes at lowpH.
pH
- (metrology)Symbol forpicohenry, anSI unit ofelectrical inductance equal to 10−12henrys.
pH
- Manuel de Codage transliteration ofpḥ.
