ISO 6843:1988 Preview
Surface active agents -- Sulfated ethoxylated alcohols and alkylphenols -- Estimation of the mean relative molecular mass
This standard was last reviewed and confirmed in 2013. Therefore this version remains current.
By successive extraction, separation, evaporation, redissolution, and filtration through an ion-exchange resin the contents of sodium chloride, anionic-active matter, polyglycol, and polyglycol sulfate are determined. From the content of anionic surface active agent (alkylether sulfate) and the anionic surface active matter content determined by two-phase titration, the mean relative molecular mass is estimated.
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