Study on gravimetric determination of high content rhodium in secondary resource materials.

A method for the determination of high content rhodium in secondary resources was developed. The pretreatment and interference tests of the samples were studied. After hydrogen reduction, the samples were digested with 20 mL hydrochloric acid and 5 mL hydrogen peroxide in a Teflon digestion tank. The samples were determined by cobalt hexamonium nitrate gravimetric method. The incomplete residue was determined by ICP-AES and corrected. The precision of the method was 0.29%~0.38%, and the recovery rate was 99.56%~101.05%, which could meet the precision and accuracy requirements of the determination of high content rhodium in secondary resources. [ABSTRACT FROM AUTHOR]