- logarithm[10] H+ concentration (pH)

Principle

• the 'p' refers to the power of 10.
• the 'H' refers to H+
• defined as - logarithm(10) H+ concentration in moles/liter
• a pH of < 7 is acidic; a pH of > 7 is basic
• a 10-fold increase in H+ concentration results in a decrease in pH of 1

More general terms

• concentration
• clinical chemistry test

More specific terms

• exhaled breath condensate pH
• pH in body fluid

Additional terms

• ambulatory esophageal pH testing