Abstract
As has already been reported, the ammonium sulfide method is comparatively satisfactory in isolating beryllium from iron, nickel, cobalt, and manganese in a solution containing tartaric acid but it is difficult to completely separate it from iron, and the writer has pointed out the necessity of removing majority of iron by the ether method. In the present method, the sample solution is rendered alkaline with ammonia and hydrogen sulfide is applied in the presence of tartaric acid to precipitate the sulfides of nickel, cobalt, and iron. After the separation of these sulfides, ammonia is added to the filtrate to allow formation of the hydroxides of aluminum and beryllium. These are then dissolved in 6N hydrochloric acid, and the minute amount of iron that remains is extracted with a mixture of ether and hydrochloric acid. The aqueous solution of hydrochloric acidity remaining here is treated by the oxine method to remove aluminum as Al(C9H6ON)3, and the filtrate is submitted to the quantitative determination of beryllium as beryllium oxide. Satisfactory results were obtained.
