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A scheme has been devised whereby PAQH complexes of iron, nickel, copper and cobalt can be separated chromatographically and determined semiquantitatively in presence of up to tenfold excesses of interfering metal ions. The visual detection limits for iron, nickel and copper were found to be ...
A chromatographic method for metal chelates of pyridine-2-aldehyde-2-quinolylhydrazone (PA QH) has been adapted to the ring-oven technique Advantage has been taken of the large difference in R f -values of the cobalt, copper, nickel and iron(III) chelates on alumina, the acid stability of...