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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 60

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[page]58[/page] II. From Phosphoric Acid Solutions.[superscript][?9,6?9,b?9.6?][/superscript] To the nearly neutral solution add sodium pyrophosphate to precipitate all the iron and [?chromium?] present and then add ammonium carbonate in excess. The solution should be perfectly clear before using. The current was passed through for at least 60 hours as the deposition was not complete until then. The results with [?the?] methods should be even better than with the last one. It requires no attention. The deposit is treated as in the others and the aluminium is determined as Al[subscript]2[/subscript]O[subscript]3[?1?,?][/subscript]P[subscript]2[/subscript]O[subscript][?5?0?3?][/subscript] which involves a loss of material. In the other separations the chloride solution gave such poor results that they were not entered. In these separations a nitrate solution was used. The results for the error are [?fair?] but for the aluminium very poor. The amounts used were exceedingly small.
 
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