ISO 3332:1975 (R2019)
Withdrawn , Reaffirmed Standard
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ISO 3332:1975 (R2019)

Ammonium sulphate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric method after distillation

Summary

Based on dissolution of a test sample in water, distillation of the ammonia after displacement by an alkali solution. Absorption in an excess of standard volumetric sulphuric acid solution and back-titration with standard volumetric sodium hydroxide solution in the presence of methyl red/methylene blue mixed indicator. A typical distillation apparatus is shown in a figure.

Notes

90.60 : Clôture de l'examen

Technical characteristics

Publisher International Organization for Standardization (ISO)
Publication Date 07/01/1975
Confirmation Date 07/19/2019
Edition 1
Page Count 4
EAN ---
ISBN ---
Weight (in grams) ---
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