The Determination of Iron in Sands and Glasses

JSGT 1936 V20 T324-T325

The material to be tested is dissolved in hydrofluoric acid, to which is added a little sulphuric acid, and the solution is evaporated to dryness at 140–160°. The residue is taken up with hydrochloric acid, bromine water is added to ensure oxidation of the iron, and, after removal of the free bromine by boiling, the iron is determined by titration with titanous chloride. The purification of the reagents is described.

A. R. Wood