Complex formation of copper(II) with triethylenetetraminehexaacetic acid

The interaction between copper (II) and triethylenetetraminehexaacetic acid (TTHA) was investigated by polarographic, spectrophotometric and potentiometric methods. The existence of chelates with the formulae CuH-TTHA, Cu-TTHA and Cu₂-TTHA was shown. The polarographic behaviour and absorption curves of the chelates are described and the equilibrium constants defining the formation of the various species, are reported.