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Abstract
The transition and lanthanide metal ions of Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu in Neodymium-iron-boron (Nd-Fe-B) magnetic material are separated and determined by high performance ion chromatography (HPIC) with spectrophotometric detection using post-column reaction methods. 4-(2-pyridylazo)resorcinol (PAR) and 2-(1,8-dihydroxy-3,6-disulfo-2-naphthylazo)benzenearsonic acid (Arsenazo-III) are used as post-column chelating agents. The reguirements for sample preparation, and characterization of the post-column reaction and the optimum conditions for the sensitive detection of these metal ions after ion chromatographic separation are discussed. The concentration of pH of the chelating medium and the composition of the eluent and the detection limits are investigated.