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ISO 3704:1976

Sulphur for industrial use — Determination of acidity — Titrimetric method

STANDARD published on 1.9.1976

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The information about the standard:

Designation standards: ISO 3704:1976
Publication date standards: 1.9.1976
The number of pages: 2
Approximate weight : 6 g (0.01 lbs)
Country: International technical standard
Category: Technical standards ISO

Annotation of standard text ISO 3704:1976 :

Description / Abstract: Applicable to products having acidities, expressed as H2 SO4 , equal to or more than 0.01 % (m/m). Describes the extraction of acidic substances with a mixture of water and propan-2-ol (isopropyl alcohol). Titration of the extract with standard volumetric sodium hydroxide solution in the presence of phenolphthalein as indicator. The preparation of the sample from the laboratory sample is carried out by grinding a sufficient quantity of the undried material until it passes through a sieve of nominal mesh of 250 m.