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ISO 2997:1974
Phosphoric acid for industrial use — Determination of sulphate content — Method by reduction and titrimetry
Automatically translated name:
Phosphoric acid for industrial use -- Determination of sulphate content -- Method by reduction and titrimetry
STANDARD published on 1.11.1974
The information about the standard:
Designation standards: ISO 2997:1974
Publication date standards: 1.11.1974
SKU: NS-430800
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: International technical standard
Category: Technical standards ISO
The category - similar standards:
Annotation of standard text ISO 2997:1974 :
Description / Abstract: 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.
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