Optimizing design in determination of silicon content in ferromolybdenum by molybdenum blue spectrophotometry

A method to determine silicon content in ferromolybdenum by molybdenum blue spectrophotometry was established.The dissolve method was established by comparison different dissolove techniques combining with effect of matrix and impurity ion.Meanwhile,the effect of the dosage ammonium molybdate and ammonium ferrous sulfate as well as wavelength etc are studied.Under optimized conditions of molybdenum blue spectrophotometric apparatus,four samples are determined simultaneously.The recoveries rate ranges from 96.8% to 103.1% and the determination rate ranges from 0.016% to 2.5%.The proposed method meet the standard of GB/T 3649—2008.