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ISO 4311:1979
M00003201
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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 by International Organization for Standardization, 06/01/1979
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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.