GSO ISO 6840:2013
Cationic surface active agents (Hydrochlorides and hydrobromides) - Determination of critical micellization concentration - Method by measurement of counter ion activity

Standard No.

GSO ISO 6840:2013

Release Date

2013

Published By

GSO

Latest

GSO ISO 6840:2013

Scope

Abstract 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.

GSO ISO 6840:2013 history

• 2013 GSO ISO 6840:2013 Cationic surface active agents (Hydrochlorides and hydrobromides) - Determination of critical micellization concentration - Method by measurement of counter ion activity