Reference number
ISO 6842:1989
ISO 6842:1989
© ISO 2025
International Standard
ISO 6842:1989
Surface active agents — Sulfated ethoxylated alcohols and alkylphenols — Determination of total active matter content
Edition 2
1989-10
1989-10
ISO 6842:1989
13349
Published
(Edition 2, 1989)
This publication was last reviewed and confirmed in 2024.
Therefore this version remains current.
Abstract
A test portion is boiled under reflux with ethanol in the presence of sodium sulphate. The solution is filtrated, the filtrate evaporated, and the residue weighed. Any sodium chloride present is determined by dissolution of the residue in aqueous acetone and titration with a standard volumetric silver nitrate solution. The mass of the residue is corrected for the sodium chloride content.
Life cycle
-
Previously
WithdrawnISO 6842:1983
-
Now