ISO 3331:1975
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.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 total nitrogen content — Titrimetric method after distillation
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
04-03-2019
English, French
01-07-1975
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Based on the conversion of nitrate into ammonia by means of Devarda's alloy in alkaline solution together with the liberation of ammonia from ammonium ions. Distillation of the ammonia from both reactions, absorption in an excess of standard volumetric sodium hydroxide solution in the presence of methyl red/methylene blue mixed indicator. A typical distillation apparatus is shown in a figure.
| DocumentType |
Standard
|
| Pages |
4
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| NBN T 03 056 : 1979 | Identical |
| BS 4267:1968 | Similar to |
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