Simultaneous multi-element instruments overcome the problem
of lower productivity to some extent. In a study Sen Gupta31
analyzed the precious metals in two groups viz., Ru, Rh, Pt and
Ir in one firing and Au, Pd and Ag in another. Using polarized
Zeeman correction, three Canadian CRMs and four new
Canadian candidate reference materials were studied. Recently
Kubrakova et al.66 has used this technique in conjunction with
microwave decomposition followed by slurry nebulization for
the determination of low levels of PGEs. Belskii et al.67 and
Schuster and Schwarzer68 have also used this technique for
precious metal analysis.