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 44

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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 44

[page]42[/page]

has been properly conducted. The precipitate of basic ferric nitrate is so very fine that unless proper precautions are taken it will run through. This gives the additional trouble of another filtration. The suction pump should not be used at first and it is best not to use it at all. It may be used after the whole precipitate has been transferred to the filter if care is taken in starting it.
     As the fibres of the filter paper have a tendency to retain aluminium salts some experiments were made to see if this was the case. Several of the aluminium solutions were put through the process of separation and filtered through [?those?] papers. This latter were properly washed dried and [?ignited?] and the weight taken. In no case was the weight appreciably greater than the weight of the [?ash?] of filter.
     The weight of the ferric oxide was high at first. This increase in weight was probably due to the presence of alkalis in the precipitate but this is not certain as the reaction of the [?ignited?] oxide was not noted.

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[page]42[/page] has been properly conducted. The precipitate of basic ferric nitrate is so very fine that unless proper precautions are taken it will run through. This gives the additional trouble of another filtration. The suction pump should not be used at first and it is best not to use it at all. It may be used after the whole precipitate has been transferred to the filter if care is taken in starting it. As the fibres of the filter paper have a tendency to retain aluminium salts some experiments were made to see if this was the case. Several of the aluminium solutions were put through the process of separation and filtered through [?those?] papers. This latter were properly washed dried and [?ignited?] and the weight taken. In no case was the weight appreciably greater than the weight of the [?ash?] of filter. The weight of the ferric oxide was high at first. This increase in weight was probably due to the presence of alkalis in the precipitate but this is not certain as the reaction of the [?ignited?] oxide was not noted.