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ISO 3704:1976

Current Revision

Sulphur for industrial use -- Determination of acidity -- Titrimetric method

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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.


SDO ISO: International Organization for Standardization
Document Number ISO 3704
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO TC 47
Publish Date Document Id Type View
Not Available ISO 3704:1976 Revision