ISO 2993:1974 (R2019)
Withdrawn , Confirmed Standard
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ISO 2993:1974 (R2019)

Ammonium sulphate for industrial use — Determination of free acidity — Titrimetric method

Summary

Applicable to products having a free acidity, expressed as H2 SO4 , equal to or more than 0.01 % (m/m). Dissolution of a test portion in Water and titration with standard volumetric sodium hydroxide solution in the presence of an indicator. The indicator must have a colour change in the pH range between 5.2 and 5.6. Has also been approved by the IUPAC.

Notes

90.60 : Clôture de l'examen

Technical characteristics

Publisher International Organization for Standardization (ISO)
Publication Date 04/01/1974
Confirmation Date 07/19/2019
Edition 1
Page Count 2
EAN ---
ISBN ---
Weight (in grams) ---
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