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ISO 6840:1982

Current Revision

Cationic surface active agents (Hydrochlorides and hydrobromides) -- Determination of critical micellization concentration -- Method by measurement of counter ion activity

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The determination is carried out as follows: Potentiometric determination of the chloride or bromide ion activity of a series of solutions of cationic surface active agents the concentration of which cover the expected micellization concentration. Plotting the graph of potential as a function of the logarithm of the concentration; the c.m.c. corresponds to the singularity on this curve. The method is applicable to purified cationic surface active agents (hydrochlorides and/or hydrobromides), which are soluble in water and which have a Krafft temperature below 60 degree Celsius.


SDO ISO: International Organization for Standardization
Document Number ISO 6840
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO TC 91
Publish Date Document Id Type View
Not Available ISO 6840:1982 Revision