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ISO 3330:1975 PDF
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Ammonium nitrate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
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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| Edition | 1975 |
|---|---|
| Published Date | 1975 |
| Published By | International Standardization Organisation |
| Page Count | 4 |
