Codes & Standards - Purchase
ISO 2993:1974
Ammonium sulphate for industrial use -- Determination of free acidity -- Titrimetric method
SKU: iso_008043_102603
Published by ISO
Publication Year 1974
1 Edition
2 pages
Product Details
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.