A substantial amount of iron(III) from Al/Fe- and Fe-pillars is (i) extracted by hydrochloric acid, ammonium oxalate at pH 3 and dithionite and (ii) reduced to FeII by hydrazine vapour or liquid or dithionite, while only trace extraction and reduction was found for dithionite–citrate–bicarbonate (DCB).
P. Komadel, D. H. Doff and J. W. Stucki, J. Chem. Soc., Chem. Commun., 1994, 1243 DOI: 10.1039/C39940001243
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