ISO 3330:1975
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Ammonium nitrate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
03-04-2019
English, French
07-01-1975
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.
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