Add time:09/09/2019 Source:sciencedirect.com
A simple and rapid method is described for chromatographing mono- and bis-2,4-dinitrophenylhydrazones derived from hydroxycarbonyl compounds. The derivatives were separated by the thin-layer technique on aluminium oxide or silica gel plates with toluene-ethyl acetate mixtures as solvents. Spraying with sodium hydroxide intensified the spots and gave blue or purple colours only with the 1,2-bishydrazones. Complex mixtures were resolved by two-dimensional methods using the same or a different adsorbent for each direction.
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