concentration gradient, \(\text{grad}\: C\)
Differential change in concentration of a component in a given direction in a small distance divided by the distance in that direction.
  1. It is a vector quantity.
  2. May be expressed as amount-of-substance, mass, number, volume, concentration @G02669@.
PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 967 (