This standard has been reviewed* and then confirmed in 2013.
The determination is carried out in a consisting of an aqueous phase and a chloroform phase, in the presence of sodium sulfate, by titration against a standard volumetric cationic-active solution (benzethonium chloride), in the presence of an indicator consisting of a mixture of a cationic dye (dimidium bromide) and an anionic dye (acid blue 1).
Edition: 2 (Monolingual) ICS: 71.100.40 Status: Published Stage: 90.93 (2013-04-22) TC/SC: ISO/TC 91 Number of Pages: 3
Revises: ISO 6121:1979
No corrigenda or amendments available