Simultaneous multielement determination of rare earth elements by substoichiometric activation analysis

This paper presents simultaneous substoichiometric separation of four rare earth elements; samarium, europium, terbium and ytterbium. The elements are separated simultaneously and substoichiometrically by forming their complexanates with substoichiometric DTPA and extracting their unreacted parts with HTTA. Application to the determination of these elements by substoichiometric neutron activation is also presented.