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B51-14 (R2019) – Boiler, pressure vessel, and pressure piping code

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ISO 6840:1982

ISO 6840:1982 Cationic surface active agents (Hydrochlorides and hydrobromides) – Determination of critical micellization concentration – Method by measurement of counter ion activity

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Description

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.

Edition

1

Published Date

1982-10-01

Status

PUBLISHED

Pages

3

Language Detail Icon

English

Format Secure Icon

Secure PDF

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.

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