DIY History | Transcribe | Scholarship at Iowa | 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 11

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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 11

allowed the precipitate to settle is probably regulated by the excess of the precipitant, which if small will require a longer time. The ignition of the precipitate of iron salt will have to be attended to with great care. It may have a tendency to puff when heated to[o] hot at one time. It may swell up into a black voluminous mass upon heating gently and at this stage it should be allowed to cool and some fuming nitric acid added to help the oxidation of the carbon. It is best to use two bunsen flames for ignition, after the mass is charred. The chief source of error will be in the ignition of the precipitate. If this latter has been conducted properly the ferric oxide will be a loose, fluffy, red mass. 
This method is said to be the most accurate as well as the most costly. 

5. Methylamine method. (4.)
Methylamine method resembles the the above one way [?]. and would be governed by the same principles. Ist sources of error would be the same and it should be as accurate too.

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allowed the precipitate to settle is probably regulated by the excess of the precipitant, which if small will require a longer time. The ignition of the precipitate of iron salt will have to be attended to with great care. It may have a tendency to puff when heated to[o] hot at one time. It may swell up into a black voluminous mass upon heating gently and at this stage it should be allowed to cool and some fuming nitric acid added to help the oxidation of the carbon. It is best to use two bunsen flames for ignition, after the mass is charred. The chief source of error will be in the ignition of the precipitate. If this latter has been conducted properly the ferric oxide will be a loose, fluffy, red mass. This method is said to be the most accurate as well as the most costly. 5. Methylamine method. (4.) Methylamine method resembles the the above one way [?]. and would be governed by the same principles. Ist sources of error would be the same and it should be as accurate too.