Development of a methodology for the determination of trace metallic constituents in presence of neptunium

摘要

An ICP-AES based methodology was developed for the determination of 22 trace metallic constituents (Ca, Co, Cr, Pb, Cu, Fe, Ga, In, Mg, Mn, Na, Ni, Sr, Zn, Eu, Sm, Gd, Dy, B, Be, Cd and Ag) in high purity neptunium matrix alongwith simultaneous determination of Np. Np 295.660 nm line was found to have the best analytical performance. The spectral interference of Np on other analytes have been investigated which includes identification of interference free line, evaluation of correction factor and tolerance level of neptunium. Presence of U, Th, Zr and Pu on the determination of Np has also been studied. The method was validated using synthetic samples.