Determination of aluminium, calcium, manganese and titanium in ferrosilicon alloys by atomic-absorption spectrophotometry

Abstract

A method for the determination of aluminium, calcium, titanium and manganese in ferrosilicon alloys is described. After elimination of silicon by the addition of hydrofluoric acid and subsequent dissolution of the residue, the solution is ready to be analysed by means of atomic-absorption spectrophotometry. The proposed method is free of interferences from the most common elements used in the production of ferrosilicon alloys, and is suitable for the determination of concentrations of aluminium and titanium down to 0·1 per cent., manganese down to 0·01 per cent. and calcium down to 0·02 per cent. These limits can be reduced by varying either the dilution of the sample solution or the amount of sample taken.