Dissolution of Al-Fe materials and analysis by inductively coupled plasma - atomic emission spectrometry

Abstract

A technique was developed for the dissolution of Al-Fe materials containing difficult to dissolve Al2O3. The developed procedure uses HCl and HNO3 for initial sample attack followed by digestion with a mixture of H3PO4 and H2SO4 at 200 °C. This procedure was employe to dissolve Al-Fe material samples before the determination of Al and Fe. Minor and trace elements (B, Cr, Cu, Mo, Si, Zr) were determined after dissolution in HCl and HNO3. Results of a round robin study verified the procedure accuracy. The developed methods have the required accuracy and precision to be used as a quality control procedure for Al-Fe materials analysis.