Photometric determination of rare-earth elements with arsenazo III in glasses with titanium

This paper develops a method of determining rare-earth elements in the presence of large quantities of titanium in glasses designed for work under conditions of intensive luminous fluxes. The authors improve the procedure by selecting a masking reagent to eliminate the interfering influence of titanium. The method was tested on artificial mixtures prepared from quartz glasses, alloyed with titanium and rare-earth oxides. The proposed method is distinguished by simplicity, speed (without considering decomposition of the sample, the time of analysis is 25 min), and gives readily reproducible results