ISO 4311:1979
Anionic and non-ionic surface active agents; Determination of the critical micellization concentration; Method by measuring surface tension with a plate, stirrup or ring

Standard No.

ISO 4311:1979

Release Date

1979

Published By

International Organization for Standardization (ISO)

Latest

ISO 4311:1979

Scope

The method is carried out in the following way: Determination of the surface tension of a series of solutions whose concentrations bracket the critical micellization concentration. Plotting of the graph of surface tension as a function of the logarithm of the concentration: the critical micellization concentration corresponds to a singular point on this curve. In this point the curve shows a sharp change of slope.

ISO 4311:1979 history

• 1979 ISO 4311:1979 Anionic and non-ionic surface active agents; Determination of the critical micellization concentration; Method by measuring surface tension with a plate, stirrup or ring