Norm

ISO 2997:1974 en

Phosphoric acid for industrial use - Determination of sulphate content - Method by reduction and titrimetry

31,57

Over deze norm

Status Definitief
Aantal pagina's 3
Gepubliceerd op 01-11-1974
Taal Engels
Applicable to products having sulphate contents equal to or more than 0.0005 % (m/m). Analysis by reduction of the sulphate to sulphide by a mixture of hydriodic acid and hypophosphorus acid. Absorption of the hydrogen sulphide evolved in a mixture of acetone and sodium hydroxide solution. Titration with a standard volumetric solution of mercury(II) acetate in the presence of dithizone as indicator. Has also been approved by the IUPAC.

Details

ICS-code 71.060.30
Nederlandse titel Phosphoric acid for industrial use - Determination of sulphate content - Method by reduction and titrimetry
Engelse titel Phosphoric acid for industrial use - Determination of sulphate content - Method by reduction and titrimetry

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