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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 27

2. Double cyanide method (15)

The solution is evaporated to small [bulk?] and then treated with a concentrated solution of sodium sulphate to reduce the ferric to ferrous iron. [?] it is added slowly to a hot ammoniacal solution of potassium cyanide of twice the volume of the first solution. (The potassium cyanide is in the Proportion of 15 - 20 gram for each 10 - 3 grams of ferric oxide). The solution is then boiled for a short time and acetic acid added. The aluminium is then precipitated with ammonium carbonate. The precipitate is filtered and washed with hot water. If the precipitate is not pure white but greenish it must be purified. This is accomplished by [digesting?] both filter and precipitate [?] dilute hydrochloric acid (1 - 4). The cyanide of iron, to which the color is due, [??] resembling berlin blue. This is [?] in the acid and may be filtered and washed and the aluminium determined in the Filtrate. 
The method of determining the iron was not given by the author.

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2. Double cyanide method (15) The solution is evaporated to small [bulk?] and then treated with a concentrated solution of sodium sulphate to reduce the ferric to ferrous iron. [?] it is added slowly to a hot ammoniacal solution of potassium cyanide of twice the volume of the first solution. (The potassium cyanide is in the Proportion of 15 - 20 gram for each 10 - 3 grams of ferric oxide). The solution is then boiled for a short time and acetic acid added. The aluminium is then precipitated with ammonium carbonate. The precipitate is filtered and washed with hot water. If the precipitate is not pure white but greenish it must be purified. This is accomplished by [digesting?] both filter and precipitate [?] dilute hydrochloric acid (1 - 4). The cyanide of iron, to which the color is due, [??] resembling berlin blue. This is [?] in the acid and may be filtered and washed and the aluminium determined in the Filtrate. The method of determining the iron was not given by the author.