Dr. Cornelia Chilan from the Physics-Engineering Department and Pearl members Maryam Abdollahi Neisiani, Dr. Mohammad Latifi, Prof. Jamal Chaouki developed a new approach for analyzing rare earth elements (REE) in high content mineral matrices by Neutron Activation Analysis (NAA).
REE k0 and Q0 values, spectral interferences and nuclear interferences were experimentally evaluated and improved with Alfa Aesar Specpure Plasma Standard 1000 mg kg-1 mono-rare earth solutions. The new iterative gamma-ray self-attenuation and neutron self-shielding methods were investigated with powder standards prepared from 100 mg of 99.9% Alfa Aesar mono rare earth oxide diluted with silica oxide. The overall performance of the new k0-NAA method for REEs was validated using a certified reference material (CRM) from Canadian Certified Reference Materials Project (REE-2). The REE concentration was determined with an uncertainty below 7% (at 95% confidence level) and proved good consistency with the CRM certified concentrations.
Check it out in The International Journal of Pure and Applied Analytical Chemistry (Talanta)