Abstract
The synthesis and analytical properties of di-2-pyridyl ketone guanylhydrazone (DPGH) are described. The reagent was tested with 37 cations but only Co(II), Ni(II), Cu(II), Fe(II) and Pd(II) gave colored complexes. The spectral characteristics of the reagent and the above complexes as well as the procedures for a selective determination of total iron, cobalt(II), copper(II), nickel(II) and palladium(II) are reported.
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