International Standard
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
Reference number
ISO 4311:1979
Edition 1
International Standard
Read sample
ISO 4311:1979
Published (Edition 1, 1979)
This standard was last reviewed and confirmed in 2022. Therefore this version remains current.

ISO 4311:1979

ISO 4311:1979
CHF 42
Convert Swiss francs (CHF) to your currency


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.

General information

  •  : Published
     : 1979-06
    : International Standard confirmed [90.93]
  •  : 1
     : 3
  • ISO/TC 91
  • RSS updates

Life cycle

Got a question?

Check out our Help and Support

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)