Determination of nanogram amounts of aluminium and indium with 4,4′-oxalylbis(hydrazonomethyl)diresorcinol

Abstract

Fluorimetric determinations of aluminium and indium, based on the formation of fluorescence complexes between Al^III or In^III and 4,4′-oxalylbis(hydrazonomethyl)diresorcinol are proposed. With excitation at 415 nm, aluminium and indium chelates have emission maxima at 470 and 475 nm, respectively; the respective detection limits are 0.8 and 2.6 ng ml^–1. Determinations of aluminium in tap waters and indium in nickel alloy and Zn-Sn-Cu-Pb ore were carried out.