Active standard | Published: 01/09/1976

ISO 3704:1976

Sulphur for industrial use — Determination of acidity — Titrimetric method
(Soufre a usage industriel — Détermination de l´acidité — Méthode titrimétrique)

Available languages: English, French

Available design: electronic design (pdf), Print design

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Detail information

Designation: ISO 3704:1976

Publication date: 01/09/1976

Pages: 2

Country: International technical standard

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Anotation

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.

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