Reference number
ISO 2994:1974
ISO 2994:1974
© ISO 2024
ISO 2994:1974
Ammonium sulphate for industrial use — Determination of matter insoluble in water — Gravimetric method
Edition 1
1974-04
1974-04
Withdrawn
Abstract
Specifies the dissolution of a test portion in water; filtration under vacuum on the filter crucible, thorough washing of the filter crucible and detection of the absence of sulphates in the wash water by a barium chloride test, drying and weighing of the insoluble residue. Has also been approved by the IUPAC.