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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 42

[page]40[/page]

[underlined]Basic Nitrate Method[/underlined][superscript](13)[/superscript]

     Mixed precipitated hydrates of iron and aluminium are dissolved in dilute nitric acid and to this solution 5cc of 20% potassium nitrate solution are added. The whole is evaporated to dryness upon a water bath and the residue moistened and then evaporated again. This process is repeated until no more [?ferrous?] of nitric acid come off. Then moisten the residue with water and transfer to a [?bralson?] and [?wash?warm?]. Add 15-20 drops of a saturated sodium sulphate solution and allow the precipitate to settle. Filter while [?warm?] and wash the basic ferric nitrate with a hot solution of dilute potassium nitrate. (Use asbestos or  a double filter paper for the filtration). Dissolve the precipitate in dilute hydrochloric acid and reprecipitate the iron with ammonia.
     To the filtrate add a little hydrochloric acid and determine the aluminium in the usual way.
     Use a small porcelain dish for the evaporation and as small a [?batch?] of solution as possible. The solution of basic [?nitrates?] is of a beautif [?beautiful?] deep red color, if the resulted

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[page]40[/page] [underlined]Basic Nitrate Method[/underlined][superscript](13)[/superscript] Mixed precipitated hydrates of iron and aluminium are dissolved in dilute nitric acid and to this solution 5cc of 20% potassium nitrate solution are added. The whole is evaporated to dryness upon a water bath and the residue moistened and then evaporated again. This process is repeated until no more [?ferrous?] of nitric acid come off. Then moisten the residue with water and transfer to a [?bralson?] and [?wash?warm?]. Add 15-20 drops of a saturated sodium sulphate solution and allow the precipitate to settle. Filter while [?warm?] and wash the basic ferric nitrate with a hot solution of dilute potassium nitrate. (Use asbestos or a double filter paper for the filtration). Dissolve the precipitate in dilute hydrochloric acid and reprecipitate the iron with ammonia. To the filtrate add a little hydrochloric acid and determine the aluminium in the usual way. Use a small porcelain dish for the evaporation and as small a [?batch?] of solution as possible. The solution of basic [?nitrates?] is of a beautif [?beautiful?] deep red color, if the resulted