G. H. Osborn, A. Jewsbury
1949
Citations
0
Influential Citations
5
Citations
Journal
Analytica Chimica Acta
Abstract
Abstract An investigation has been made into the separation of aluminium from beryllium by the ammonium benzoate method. It has been shown (a) that over a wide range of concentrations aluminium can be determined with a maximum error of 2 %, (b) that the beryllium can be estimated after the removal of the aluminium with an error of not more than 2 % if the proportion of alumina, to beryllia is not more than 1 : 1. If the proportion of alumina to beryllia is greater than 1 : 1 considerable inaccuracy in the beryllium determination will result due to the co-precipitation of the beryllium with the aluminium benzoate; (c) that a double precipitation is required to obtain a satisfactory separation of aluminium and beryllium, (d) that although KoLTOFF el al. reported partial precipitation of beryllium with ammonium benzoate, this does not occur if tlie PH is carefully controlled between 3.5–4.0, and (e) it has been confirmed that ammonium benzoate precipitates aluminium quantitatively at PH 3.5u4.0 wlilst beryllium does not commence to precipitate until about PH 6.5.