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ISO 3332:1975

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

Jul 1, 1975
95.99 Withdrawal of Standard   Apr 30, 2025

General information

95.99     Apr 30, 2025

ISO

ISO/TC 47

International Standard

71.060.50  

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Scope

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.

Life cycle

NOW

WITHDRAWN
ISO 3332:1975
95.99 Withdrawal of Standard
Apr 30, 2025

National adoptions

SSH ISO 3332:1975  
DPS

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

60.60 Standard published

DPS/KT 47 more