Gibbs adsorption equation

Gibbs adsorption equation

[′gibz ad′sȯrp·shən i‚kwā·zhən]
(physical chemistry)
A formula for a system involving a solvent and a solute, according to which there is an excess surface concentration of solute if the solute decreases the surface tension, and a deficient surface concentration of solute if the solute increases the surface tension.
References in periodicals archive ?
When a non-ionic surfactant is adsorbed at the liquid-air interface, the surface excess is given by the Gibbs adsorption equation as:
Using all these experimental data in the integrated forms of the Gibbs adsorption equations, the standard molar free energy change [DELTA][G.