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The Analytical Separation of Iron and Aluminium by Henry Erdmann Radasch, 1897

The Analytical Separation of Iron and Aluminium by Henry Erdmann Radasch, 1897, Page 23

acetate and boil from 1 - 2 hours without replacing the evaporated water. Allow the precipitate to settle and filter. Wash once or twice to get rid of most of the tartaric acid and dissolve the precipitate in dilute nitric acid. This solution is then nearly neutralised with ammonia and 2 - 3 drops of phosphoric acid added [??] 2 - 3 grams of ammonium acetate. Boil from 1/2 - 1 hour and filter and wash. [But?] to use boiling water throughout for washing the precipitate of aluminium Phosphate. Dry, ignite and weigh the precipitate as Al2O3, PO5.
The separation of the iron is easily and completely accomplished. The method is tedious, however, as the time required for boiling is considerable. This method has the disadvantage of requiring a second precipitation of the aluminium phosphate. The object of this is to get rid of the tartaric acid. It could not be washed out of the first precipitate completely and would give considerable trouble in the ignition of the precipitate. This double precipitation coupled with the extreme [?] of the precipitate

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acetate and boil from 1 - 2 hours without replacing the evaporated water. Allow the precipitate to settle and filter. Wash once or twice to get rid of most of the tartaric acid and dissolve the precipitate in dilute nitric acid. This solution is then nearly neutralised with ammonia and 2 - 3 drops of phosphoric acid added [??] 2 - 3 grams of ammonium acetate. Boil from 1/2 - 1 hour and filter and wash. [But?] to use boiling water throughout for washing the precipitate of aluminium Phosphate. Dry, ignite and weigh the precipitate as Al2O3, PO5. The separation of the iron is easily and completely accomplished. The method is tedious, however, as the time required for boiling is considerable. This method has the disadvantage of requiring a second precipitation of the aluminium phosphate. The object of this is to get rid of the tartaric acid. It could not be washed out of the first precipitate completely and would give considerable trouble in the ignition of the precipitate. This double precipitation coupled with the extreme [?] of the precipitate